diff --git a/build.gradle.kts b/build.gradle.kts
index b1de69f..2c77388 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -17,7 +17,7 @@ repositories {
 }
 
 kotlin {
-    jvmToolchain(17)
+    jvmToolchain(8)
     jvm {
         compilations.all {
             kotlinOptions.jvmTarget = "1.8"
@@ -75,7 +75,28 @@ kotlin {
             baseName = "mp_bintools"
         }
     }
-    
+
+    listOf(
+        iosX64(),
+        iosArm64(),
+        iosSimulatorArm64()
+    ).forEach {
+        it.binaries.framework {
+            baseName = "mp_bintools"
+            isStatic = true
+        }
+    }
+
+    listOf(
+        macosX64(),
+        macosArm64()
+    ).forEach {
+        it.binaries.framework {
+            baseName = "mp_bintools"
+            isStatic = true
+        }
+    }
+
     sourceSets {
         all {
             languageSettings.optIn("kotlinx.serialization.ExperimentalSerializationApi")
@@ -94,14 +115,14 @@ kotlin {
         val commonTest by getting {
             dependencies {
                 implementation(kotlin("test"))
-                implementation("net.sergeych:mp_stools:1.4.4-SNAPSHOT")
+                implementation("net.sergeych:mp_stools:1.4.7")
             }
         }
         val jvmMain by getting
         val jvmTest by getting
         val jsMain by getting {
             dependencies {
-                implementation("net.sergeych:mp_stools:1.4.4-SNAPSHOT")
+                implementation("net.sergeych:mp_stools:1.4.7")
             }
         }
         val jsTest by getting
@@ -109,7 +130,7 @@ kotlin {
         val nativeTest by getting
         val wasmJsMain by getting {
             dependencies {
-                implementation("net.sergeych:mp_stools:1.4.4-SNAPSHOT")
+                implementation("net.sergeych:mp_stools:1.4.7")
             }
         }
         val wasmJsTest by getting
diff --git a/gradlew b/gradlew
index 1b6c787..1aa94a4 100755
--- a/gradlew
+++ b/gradlew
@@ -55,7 +55,7 @@
 #       Darwin, MinGW, and NonStop.
 #
 #   (3) This script is generated from the Groovy template
-#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
 #       within the Gradle project.
 #
 #       You can find Gradle at https://github.com/gradle/gradle/.
@@ -80,13 +80,11 @@ do
     esac
 done
 
-APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
-
-APP_NAME="Gradle"
+# This is normally unused
+# shellcheck disable=SC2034
 APP_BASE_NAME=${0##*/}
-
-# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD=maximum
@@ -133,22 +131,29 @@ location of your Java installation."
     fi
 else
     JAVACMD=java
-    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
 
 Please set the JAVA_HOME variable in your environment to match the
 location of your Java installation."
+    fi
 fi
 
 # Increase the maximum file descriptors if we can.
 if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
     case $MAX_FD in #(
       max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
         MAX_FD=$( ulimit -H -n ) ||
             warn "Could not query maximum file descriptor limit"
     esac
     case $MAX_FD in  #(
       '' | soft) :;; #(
       *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
         ulimit -n "$MAX_FD" ||
             warn "Could not set maximum file descriptor limit to $MAX_FD"
     esac
@@ -193,11 +198,15 @@ if "$cygwin" || "$msys" ; then
     done
 fi
 
-# Collect all arguments for the java command;
-#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
-#     shell script including quotes and variable substitutions, so put them in
-#     double quotes to make sure that they get re-expanded; and
-#   * put everything else in single quotes, so that it's not re-expanded.
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
 
 set -- \
         "-Dorg.gradle.appname=$APP_BASE_NAME" \
@@ -205,6 +214,12 @@ set -- \
         org.gradle.wrapper.GradleWrapperMain \
         "$@"
 
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
 # Use "xargs" to parse quoted args.
 #
 # With -n1 it outputs one arg per line, with the quotes and backslashes removed.
diff --git a/gradlew.bat b/gradlew.bat
index 107acd3..93e3f59 100644
--- a/gradlew.bat
+++ b/gradlew.bat
@@ -14,7 +14,7 @@
 @rem limitations under the License.
 @rem
 
-@if "%DEBUG%" == "" @echo off
+@if "%DEBUG%"=="" @echo off
 @rem ##########################################################################
 @rem
 @rem  Gradle startup script for Windows
@@ -25,7 +25,8 @@
 if "%OS%"=="Windows_NT" setlocal
 
 set DIRNAME=%~dp0
-if "%DIRNAME%" == "" set DIRNAME=.
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
@@ -40,7 +41,7 @@ if defined JAVA_HOME goto findJavaFromJavaHome
 
 set JAVA_EXE=java.exe
 %JAVA_EXE% -version >NUL 2>&1
-if "%ERRORLEVEL%" == "0" goto execute
+if %ERRORLEVEL% equ 0 goto execute
 
 echo.
 echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
@@ -75,13 +76,15 @@ set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
 
 :end
 @rem End local scope for the variables with windows NT shell
-if "%ERRORLEVEL%"=="0" goto mainEnd
+if %ERRORLEVEL% equ 0 goto mainEnd
 
 :fail
 rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
 rem the _cmd.exe /c_ return code!
-if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
-exit /b 1
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
 
 :mainEnd
 if "%OS%"=="Windows_NT" endlocal
diff --git a/src/iosArm64Main/kotlin/net.sergeych.bintools/KVStorage.iosArm64.kt b/src/iosArm64Main/kotlin/net.sergeych.bintools/KVStorage.iosArm64.kt
new file mode 100644
index 0000000..8f28db7
--- /dev/null
+++ b/src/iosArm64Main/kotlin/net.sergeych.bintools/KVStorage.iosArm64.kt
@@ -0,0 +1,25 @@
+package net.sergeych.bintools
+
+/**
+ * Create per-platform default named storage.
+ *
+ * - In the browser, it uses the `Window.localStorage` prefixing items
+ *   by a string containing the [name]
+ *
+ * - In the JVM environment it uses folder-based storage on the file system. The name
+ *   is considered to be a folder name (the whole path which will be automatically created)
+ *   using the following rules:
+ *    - when the name starts with slash (`/`) it is treated as an absolute path to a folder
+ *    - when the name contains slash, it is considered to be a relative folder to the
+ *      `User.home` directory, like "`~/`" on unix systems.
+ *    - otherwise, the folder will be created in "`~/.local_storage`" parent directory
+ *      (which also will be created if needed).
+ *
+ *  - For the native platorms it is not yet implemented (but will be soon).
+ *
+ *  See [DataKVStorage] and [DataProvider] to implement a KVStorage on filesystems and like,
+ *  and `FileDataProvider` class on JVM target.
+ */
+actual fun defaultNamedStorage(name: String): KVStorage {
+    TODO("Not yet implemented")
+}
\ No newline at end of file
diff --git a/src/iosArm64Main/kotlin/net/sergeych/synctools/ProtectedOp.iosArm64.kt b/src/iosArm64Main/kotlin/net/sergeych/synctools/ProtectedOp.iosArm64.kt
new file mode 100644
index 0000000..05d0194
--- /dev/null
+++ b/src/iosArm64Main/kotlin/net/sergeych/synctools/ProtectedOp.iosArm64.kt
@@ -0,0 +1,27 @@
+package net.sergeych.synctools
+
+import kotlinx.atomicfu.locks.ReentrantLock
+
+/**
+ * Get the platform-depended implementation of a mutex. It does nothing in the
+ * browser and use appropriate mechanics on JVM and native targets. See
+ * [ProtectedOpImplementation.invoke], [ProtectedOpImplementation.withLock]
+ * ```kotlin
+ * val op = ProtectedOp()
+ * //...
+ * op {
+ *      // mutually exclusive execution
+ *      println("sequential execution here")
+ * }
+ * ~~~
+ */
+actual fun ProtectedOp(): ProtectedOpImplementation = object : ProtectedOpImplementation {
+    private val access = ReentrantLock()
+    override fun lock() {
+        access.lock()
+    }
+
+    override fun unlock() {
+        access.unlock()
+    }
+}
\ No newline at end of file
diff --git a/src/iosArm64Main/kotlin/net/sergeych/synctools/WaitHandle.iosArm64.kt b/src/iosArm64Main/kotlin/net/sergeych/synctools/WaitHandle.iosArm64.kt
new file mode 100644
index 0000000..82b6acd
--- /dev/null
+++ b/src/iosArm64Main/kotlin/net/sergeych/synctools/WaitHandle.iosArm64.kt
@@ -0,0 +1,38 @@
+package net.sergeych.synctools
+
+import kotlinx.coroutines.TimeoutCancellationException
+import kotlinx.coroutines.channels.Channel
+import kotlinx.coroutines.runBlocking
+import kotlinx.coroutines.withTimeout
+
+/**
+ * Platform-independent interface to thread wait/notify. Does nothing in JS/browser,
+ * and uses appropriate mechanics on other platforms.
+ */
+@Suppress("EXPECT_ACTUAL_CLASSIFIERS_ARE_IN_BETA_WARNING")
+actual class WaitHandle {
+    private val channel = Channel<Unit>()
+    actual fun await(milliseconds: Long): Boolean {
+        return runBlocking {
+            try {
+                if( milliseconds > 0) {
+                    withTimeout(milliseconds) {
+                        channel.receive()
+                        true
+                    }
+                }
+                else {
+                    channel.receive()
+                    true
+                }
+            }
+            catch(_: TimeoutCancellationException) {
+                false
+            }
+        }
+    }
+
+    actual fun wakeUp() {
+        runBlocking { channel.send(Unit) }
+    }
+}
\ No newline at end of file
diff --git a/src/iosSimulatorArm64Main/kotlin/net.sergeych.bintools/KVStorage.iosSimulatorArm64.kt b/src/iosSimulatorArm64Main/kotlin/net.sergeych.bintools/KVStorage.iosSimulatorArm64.kt
new file mode 100644
index 0000000..8f28db7
--- /dev/null
+++ b/src/iosSimulatorArm64Main/kotlin/net.sergeych.bintools/KVStorage.iosSimulatorArm64.kt
@@ -0,0 +1,25 @@
+package net.sergeych.bintools
+
+/**
+ * Create per-platform default named storage.
+ *
+ * - In the browser, it uses the `Window.localStorage` prefixing items
+ *   by a string containing the [name]
+ *
+ * - In the JVM environment it uses folder-based storage on the file system. The name
+ *   is considered to be a folder name (the whole path which will be automatically created)
+ *   using the following rules:
+ *    - when the name starts with slash (`/`) it is treated as an absolute path to a folder
+ *    - when the name contains slash, it is considered to be a relative folder to the
+ *      `User.home` directory, like "`~/`" on unix systems.
+ *    - otherwise, the folder will be created in "`~/.local_storage`" parent directory
+ *      (which also will be created if needed).
+ *
+ *  - For the native platorms it is not yet implemented (but will be soon).
+ *
+ *  See [DataKVStorage] and [DataProvider] to implement a KVStorage on filesystems and like,
+ *  and `FileDataProvider` class on JVM target.
+ */
+actual fun defaultNamedStorage(name: String): KVStorage {
+    TODO("Not yet implemented")
+}
\ No newline at end of file
diff --git a/src/iosSimulatorArm64Main/kotlin/net/sergeych/synctools/ProtectedOp.iosSimulatorArm64.kt b/src/iosSimulatorArm64Main/kotlin/net/sergeych/synctools/ProtectedOp.iosSimulatorArm64.kt
new file mode 100644
index 0000000..6ce1e55
--- /dev/null
+++ b/src/iosSimulatorArm64Main/kotlin/net/sergeych/synctools/ProtectedOp.iosSimulatorArm64.kt
@@ -0,0 +1,17 @@
+package net.sergeych.synctools
+
+import kotlinx.atomicfu.locks.ReentrantLock
+
+/**
+ * Native implementation uses `ReentrantLock`]
+ */
+actual fun ProtectedOp(): ProtectedOpImplementation = object : ProtectedOpImplementation {
+    private val access = ReentrantLock()
+    override fun lock() {
+        access.lock()
+    }
+
+    override fun unlock() {
+        access.unlock()
+    }
+}
\ No newline at end of file
diff --git a/src/iosSimulatorArm64Main/kotlin/net/sergeych/synctools/WaitHandle.iosSimulatorArm64.kt b/src/iosSimulatorArm64Main/kotlin/net/sergeych/synctools/WaitHandle.iosSimulatorArm64.kt
new file mode 100644
index 0000000..efb35d6
--- /dev/null
+++ b/src/iosSimulatorArm64Main/kotlin/net/sergeych/synctools/WaitHandle.iosSimulatorArm64.kt
@@ -0,0 +1,34 @@
+package net.sergeych.synctools
+
+import kotlinx.coroutines.TimeoutCancellationException
+import kotlinx.coroutines.channels.Channel
+import kotlinx.coroutines.runBlocking
+import kotlinx.coroutines.withTimeout
+
+@Suppress("EXPECT_ACTUAL_CLASSIFIERS_ARE_IN_BETA_WARNING")
+actual class WaitHandle {
+    private val channel = Channel<Unit>()
+    actual fun await(milliseconds: Long): Boolean {
+        return runBlocking {
+            try {
+                if( milliseconds > 0) {
+                    withTimeout(milliseconds) {
+                        channel.receive()
+                        true
+                    }
+                }
+                else {
+                    channel.receive()
+                    true
+                }
+            }
+            catch(_: TimeoutCancellationException) {
+                false
+            }
+        }
+    }
+
+    actual fun wakeUp() {
+        runBlocking { channel.send(Unit) }
+    }
+}
\ No newline at end of file
diff --git a/src/iosX64Main/kotlin/net.sergeych.bintools/KVStorage.iosX64.kt b/src/iosX64Main/kotlin/net.sergeych.bintools/KVStorage.iosX64.kt
new file mode 100644
index 0000000..8f28db7
--- /dev/null
+++ b/src/iosX64Main/kotlin/net.sergeych.bintools/KVStorage.iosX64.kt
@@ -0,0 +1,25 @@
+package net.sergeych.bintools
+
+/**
+ * Create per-platform default named storage.
+ *
+ * - In the browser, it uses the `Window.localStorage` prefixing items
+ *   by a string containing the [name]
+ *
+ * - In the JVM environment it uses folder-based storage on the file system. The name
+ *   is considered to be a folder name (the whole path which will be automatically created)
+ *   using the following rules:
+ *    - when the name starts with slash (`/`) it is treated as an absolute path to a folder
+ *    - when the name contains slash, it is considered to be a relative folder to the
+ *      `User.home` directory, like "`~/`" on unix systems.
+ *    - otherwise, the folder will be created in "`~/.local_storage`" parent directory
+ *      (which also will be created if needed).
+ *
+ *  - For the native platorms it is not yet implemented (but will be soon).
+ *
+ *  See [DataKVStorage] and [DataProvider] to implement a KVStorage on filesystems and like,
+ *  and `FileDataProvider` class on JVM target.
+ */
+actual fun defaultNamedStorage(name: String): KVStorage {
+    TODO("Not yet implemented")
+}
\ No newline at end of file
diff --git a/src/iosX64Main/kotlin/net/sergeych/synctools/ProtectedOp.iosX64.kt b/src/iosX64Main/kotlin/net/sergeych/synctools/ProtectedOp.iosX64.kt
new file mode 100644
index 0000000..6ce1e55
--- /dev/null
+++ b/src/iosX64Main/kotlin/net/sergeych/synctools/ProtectedOp.iosX64.kt
@@ -0,0 +1,17 @@
+package net.sergeych.synctools
+
+import kotlinx.atomicfu.locks.ReentrantLock
+
+/**
+ * Native implementation uses `ReentrantLock`]
+ */
+actual fun ProtectedOp(): ProtectedOpImplementation = object : ProtectedOpImplementation {
+    private val access = ReentrantLock()
+    override fun lock() {
+        access.lock()
+    }
+
+    override fun unlock() {
+        access.unlock()
+    }
+}
\ No newline at end of file
diff --git a/src/iosX64Main/kotlin/net/sergeych/synctools/WaitHandle.iosX64.kt b/src/iosX64Main/kotlin/net/sergeych/synctools/WaitHandle.iosX64.kt
new file mode 100644
index 0000000..efb35d6
--- /dev/null
+++ b/src/iosX64Main/kotlin/net/sergeych/synctools/WaitHandle.iosX64.kt
@@ -0,0 +1,34 @@
+package net.sergeych.synctools
+
+import kotlinx.coroutines.TimeoutCancellationException
+import kotlinx.coroutines.channels.Channel
+import kotlinx.coroutines.runBlocking
+import kotlinx.coroutines.withTimeout
+
+@Suppress("EXPECT_ACTUAL_CLASSIFIERS_ARE_IN_BETA_WARNING")
+actual class WaitHandle {
+    private val channel = Channel<Unit>()
+    actual fun await(milliseconds: Long): Boolean {
+        return runBlocking {
+            try {
+                if( milliseconds > 0) {
+                    withTimeout(milliseconds) {
+                        channel.receive()
+                        true
+                    }
+                }
+                else {
+                    channel.receive()
+                    true
+                }
+            }
+            catch(_: TimeoutCancellationException) {
+                false
+            }
+        }
+    }
+
+    actual fun wakeUp() {
+        runBlocking { channel.send(Unit) }
+    }
+}
\ No newline at end of file
diff --git a/src/jvmMain/kotlin/net.sergeych.bintools/FileDataProvider.kt b/src/jvmMain/kotlin/net.sergeych.bintools/FileDataProvider.kt
index bf16ef5..1f27eca 100644
--- a/src/jvmMain/kotlin/net.sergeych.bintools/FileDataProvider.kt
+++ b/src/jvmMain/kotlin/net.sergeych.bintools/FileDataProvider.kt
@@ -5,23 +5,23 @@ import java.io.OutputStream
 import java.nio.file.Path
 import kotlin.io.path.*
 
-class FileDataProvider(val folder: Path): DataProvider {
+class FileDataProvider(val folder: Path) : DataProvider {
 
-    class Source(private val input: InputStream): DataSource {
+    class Source(private val input: InputStream) : DataSource {
         override fun readByte(): Byte {
             val b = input.read()
-            if( b < 0) throw DataSource.EndOfData()
+            if (b < 0) throw DataSource.EndOfData()
             return b.toByte()
         }
 
         override fun readBytes(size: Int): ByteArray {
-            return input.readNBytes(size).also {
-                if( it.size < size ) throw DataSource.EndOfData()
+            return input.readNBytes2(size).also {
+                if (it.size < size) throw DataSource.EndOfData()
             }
         }
     }
 
-    class Sink(private val out: OutputStream): DataSink {
+    class Sink(private val out: OutputStream) : DataSink {
         override fun writeByte(data: Byte) {
             out.write(data.toInt())
         }
@@ -44,4 +44,16 @@ class FileDataProvider(val folder: Path): DataProvider {
         .listDirectoryEntries()
         .filter { it.isRegularFile() && it.isReadable() }
         .map { it.name }
+}
+
+/**
+ * Compatibility with Java8 and android. Read up to N bytes
+ */
+fun InputStream.readNBytes2(size: Int): ByteArray {
+    val result = ByteArray(size)
+    val len = read(result)
+    return if (len < size)
+        result.sliceArray(0..<len)
+    else
+        result
 }
\ No newline at end of file
diff --git a/src/macosArm64Main/kotlin/net.sergeych.bintools/KVStorage.macosArm64.kt b/src/macosArm64Main/kotlin/net.sergeych.bintools/KVStorage.macosArm64.kt
new file mode 100644
index 0000000..8f28db7
--- /dev/null
+++ b/src/macosArm64Main/kotlin/net.sergeych.bintools/KVStorage.macosArm64.kt
@@ -0,0 +1,25 @@
+package net.sergeych.bintools
+
+/**
+ * Create per-platform default named storage.
+ *
+ * - In the browser, it uses the `Window.localStorage` prefixing items
+ *   by a string containing the [name]
+ *
+ * - In the JVM environment it uses folder-based storage on the file system. The name
+ *   is considered to be a folder name (the whole path which will be automatically created)
+ *   using the following rules:
+ *    - when the name starts with slash (`/`) it is treated as an absolute path to a folder
+ *    - when the name contains slash, it is considered to be a relative folder to the
+ *      `User.home` directory, like "`~/`" on unix systems.
+ *    - otherwise, the folder will be created in "`~/.local_storage`" parent directory
+ *      (which also will be created if needed).
+ *
+ *  - For the native platorms it is not yet implemented (but will be soon).
+ *
+ *  See [DataKVStorage] and [DataProvider] to implement a KVStorage on filesystems and like,
+ *  and `FileDataProvider` class on JVM target.
+ */
+actual fun defaultNamedStorage(name: String): KVStorage {
+    TODO("Not yet implemented")
+}
\ No newline at end of file
diff --git a/src/macosArm64Main/kotlin/net/sergeych/synctools/ProtectedOp.macosArm64.kt b/src/macosArm64Main/kotlin/net/sergeych/synctools/ProtectedOp.macosArm64.kt
new file mode 100644
index 0000000..6ce1e55
--- /dev/null
+++ b/src/macosArm64Main/kotlin/net/sergeych/synctools/ProtectedOp.macosArm64.kt
@@ -0,0 +1,17 @@
+package net.sergeych.synctools
+
+import kotlinx.atomicfu.locks.ReentrantLock
+
+/**
+ * Native implementation uses `ReentrantLock`]
+ */
+actual fun ProtectedOp(): ProtectedOpImplementation = object : ProtectedOpImplementation {
+    private val access = ReentrantLock()
+    override fun lock() {
+        access.lock()
+    }
+
+    override fun unlock() {
+        access.unlock()
+    }
+}
\ No newline at end of file
diff --git a/src/macosArm64Main/kotlin/net/sergeych/synctools/WaitHandle.macosArm64.kt b/src/macosArm64Main/kotlin/net/sergeych/synctools/WaitHandle.macosArm64.kt
new file mode 100644
index 0000000..efb35d6
--- /dev/null
+++ b/src/macosArm64Main/kotlin/net/sergeych/synctools/WaitHandle.macosArm64.kt
@@ -0,0 +1,34 @@
+package net.sergeych.synctools
+
+import kotlinx.coroutines.TimeoutCancellationException
+import kotlinx.coroutines.channels.Channel
+import kotlinx.coroutines.runBlocking
+import kotlinx.coroutines.withTimeout
+
+@Suppress("EXPECT_ACTUAL_CLASSIFIERS_ARE_IN_BETA_WARNING")
+actual class WaitHandle {
+    private val channel = Channel<Unit>()
+    actual fun await(milliseconds: Long): Boolean {
+        return runBlocking {
+            try {
+                if( milliseconds > 0) {
+                    withTimeout(milliseconds) {
+                        channel.receive()
+                        true
+                    }
+                }
+                else {
+                    channel.receive()
+                    true
+                }
+            }
+            catch(_: TimeoutCancellationException) {
+                false
+            }
+        }
+    }
+
+    actual fun wakeUp() {
+        runBlocking { channel.send(Unit) }
+    }
+}
\ No newline at end of file
diff --git a/src/macosX64Main/kotlin/net.sergeych.bintools/KVStorage.macosX64.kt b/src/macosX64Main/kotlin/net.sergeych.bintools/KVStorage.macosX64.kt
new file mode 100644
index 0000000..8f28db7
--- /dev/null
+++ b/src/macosX64Main/kotlin/net.sergeych.bintools/KVStorage.macosX64.kt
@@ -0,0 +1,25 @@
+package net.sergeych.bintools
+
+/**
+ * Create per-platform default named storage.
+ *
+ * - In the browser, it uses the `Window.localStorage` prefixing items
+ *   by a string containing the [name]
+ *
+ * - In the JVM environment it uses folder-based storage on the file system. The name
+ *   is considered to be a folder name (the whole path which will be automatically created)
+ *   using the following rules:
+ *    - when the name starts with slash (`/`) it is treated as an absolute path to a folder
+ *    - when the name contains slash, it is considered to be a relative folder to the
+ *      `User.home` directory, like "`~/`" on unix systems.
+ *    - otherwise, the folder will be created in "`~/.local_storage`" parent directory
+ *      (which also will be created if needed).
+ *
+ *  - For the native platorms it is not yet implemented (but will be soon).
+ *
+ *  See [DataKVStorage] and [DataProvider] to implement a KVStorage on filesystems and like,
+ *  and `FileDataProvider` class on JVM target.
+ */
+actual fun defaultNamedStorage(name: String): KVStorage {
+    TODO("Not yet implemented")
+}
\ No newline at end of file
diff --git a/src/macosX64Main/kotlin/net/sergeych/synctools/ProtectedOp.macosX64.kt b/src/macosX64Main/kotlin/net/sergeych/synctools/ProtectedOp.macosX64.kt
new file mode 100644
index 0000000..6ce1e55
--- /dev/null
+++ b/src/macosX64Main/kotlin/net/sergeych/synctools/ProtectedOp.macosX64.kt
@@ -0,0 +1,17 @@
+package net.sergeych.synctools
+
+import kotlinx.atomicfu.locks.ReentrantLock
+
+/**
+ * Native implementation uses `ReentrantLock`]
+ */
+actual fun ProtectedOp(): ProtectedOpImplementation = object : ProtectedOpImplementation {
+    private val access = ReentrantLock()
+    override fun lock() {
+        access.lock()
+    }
+
+    override fun unlock() {
+        access.unlock()
+    }
+}
\ No newline at end of file
diff --git a/src/macosX64Main/kotlin/net/sergeych/synctools/WaitHandle.macosX64.kt b/src/macosX64Main/kotlin/net/sergeych/synctools/WaitHandle.macosX64.kt
new file mode 100644
index 0000000..efb35d6
--- /dev/null
+++ b/src/macosX64Main/kotlin/net/sergeych/synctools/WaitHandle.macosX64.kt
@@ -0,0 +1,34 @@
+package net.sergeych.synctools
+
+import kotlinx.coroutines.TimeoutCancellationException
+import kotlinx.coroutines.channels.Channel
+import kotlinx.coroutines.runBlocking
+import kotlinx.coroutines.withTimeout
+
+@Suppress("EXPECT_ACTUAL_CLASSIFIERS_ARE_IN_BETA_WARNING")
+actual class WaitHandle {
+    private val channel = Channel<Unit>()
+    actual fun await(milliseconds: Long): Boolean {
+        return runBlocking {
+            try {
+                if( milliseconds > 0) {
+                    withTimeout(milliseconds) {
+                        channel.receive()
+                        true
+                    }
+                }
+                else {
+                    channel.receive()
+                    true
+                }
+            }
+            catch(_: TimeoutCancellationException) {
+                false
+            }
+        }
+    }
+
+    actual fun wakeUp() {
+        runBlocking { channel.send(Unit) }
+    }
+}
\ No newline at end of file