diff --git a/AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/Support/HostedUI/HostedUIASWebAuthenticationSession.swift b/AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/Support/HostedUI/HostedUIASWebAuthenticationSession.swift
index 4e42a50c99..872a876e06 100644
--- a/AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/Support/HostedUI/HostedUIASWebAuthenticationSession.swift
+++ b/AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/Support/HostedUI/HostedUIASWebAuthenticationSession.swift
@@ -62,7 +62,7 @@ class HostedUIASWebAuthenticationSession: NSObject, HostedUISessionBehavior {
 
             DispatchQueue.main.async {
                 var canStart = true
-                if #available(macOS 10.15.4, iOS 13.4, *) {
+                if #available(macOS 12.0, iOS 13.4, *) {
                     canStart = aswebAuthenticationSession.canStart
                 }
                 if canStart {
diff --git a/AmplifyPlugins/Logging/Sources/AWSCloudWatchLoggingPlugin/Persistence/LogFile.swift b/AmplifyPlugins/Logging/Sources/AWSCloudWatchLoggingPlugin/Persistence/LogFile.swift
index 03ee67607a..82aa7b1b9a 100644
--- a/AmplifyPlugins/Logging/Sources/AWSCloudWatchLoggingPlugin/Persistence/LogFile.swift
+++ b/AmplifyPlugins/Logging/Sources/AWSCloudWatchLoggingPlugin/Persistence/LogFile.swift
@@ -29,7 +29,7 @@ final class LogFile {
         self.fileURL = fileURL
         self.sizeLimitInBytes = sizeLimitInBytes
         self.handle = try FileHandle(forUpdating: fileURL)
-        if #available(macOS 10.15.4, iOS 13.4, watchOS 6.2, tvOS 13.4, *) {
+        if #available(macOS 12.0, iOS 13.4, watchOS 6.2, tvOS 13.4, *) {
             self.count = try self.handle.offset()
         } else {
             self.count = self.handle.offsetInFile
@@ -67,7 +67,7 @@ final class LogFile {
     /// Writes the given **single line of text** represented as a
     /// Data  to the underlying log file.
     func write(data: Data) throws {
-        if #available(macOS 10.15.4, iOS 13.4, watchOS 6.2, tvOS 13.4, *) {
+        if #available(macOS 12.0, iOS 13.4, watchOS 6.2, tvOS 13.4, *) {
             try self.handle.write(contentsOf: data)
         } else {
             self.handle.write(data)
diff --git a/AmplifyPlugins/Storage/Sources/AWSS3StoragePlugin/Support/Internal/FileHandle+UInt64.swift b/AmplifyPlugins/Storage/Sources/AWSS3StoragePlugin/Support/Internal/FileHandle+UInt64.swift
index be6eb4bb49..220d02d400 100644
--- a/AmplifyPlugins/Storage/Sources/AWSS3StoragePlugin/Support/Internal/FileHandle+UInt64.swift
+++ b/AmplifyPlugins/Storage/Sources/AWSS3StoragePlugin/Support/Internal/FileHandle+UInt64.swift
@@ -34,7 +34,7 @@ extension FileHandle {
     }
 
     private func readData(upToCount length: Int) throws -> Data? {
-        if #available(iOS 13.4, macOS 10.15.4, tvOS 13.4, *) {
+        if #available(iOS 13.4, macOS 12.0, tvOS 13.4, *) {
             return try read(upToCount: length)
         } else {
             return readData(ofLength: length)
diff --git a/Package.swift b/Package.swift
index dda063d628..5d3449ac90 100644
--- a/Package.swift
+++ b/Package.swift
@@ -4,7 +4,7 @@ import PackageDescription
 
 let platforms: [SupportedPlatform] = [
     .iOS(.v13),
-    .macOS(.v10_15),
+    .macOS(.v12),
     .tvOS(.v13),
     .watchOS(.v9)
 ]
diff --git a/README-combine-support.md b/README-combine-support.md
index c0ede123a7..07297da0f2 100644
--- a/README-combine-support.md
+++ b/README-combine-support.md
@@ -2,7 +2,7 @@
 
 <img src="https://s3.amazonaws.com/aws-mobile-hub-images/aws-amplify-logo.png" alt="AWS Amplify" width="550" >
 
-Amplify supports iOS 13+ and macOS 10.15+, and ships with APIs that leverage Swift Concurrency (async/await) to return values. For example, the following returns an array of type `Geo.Place` with search results for coffee shops.
+Amplify supports iOS 13+ and macOS 12+, and ships with APIs that leverage Swift Concurrency (async/await) to return values. For example, the following returns an array of type `Geo.Place` with search results for coffee shops.
 
 ```swift
 let places = try await Amplify.Geo.search(for "coffee")
diff --git a/README.md b/README.md
index 7e7cb23040..4901a18a4f 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ The Amplify Library for Swift is layered on the [AWS SDK for Swift](https://aws.
 | Platform  | Versions  | Support Level |
 | ---------: | -------:  | :-----------: |
 | iOS       | 13+       | GA            |
-| macOS     | 10.15+    | GA            |
+| macOS     | 12+    | GA            |
 | tvOS      | 13+       | GA            |
 | watchOS   | 9+        | GA            |
 | visionOS  | 1+        | Preview*      |