Add macOS build support

Author: Dave Kozma

README.md

@@ -64,11 +64,11 @@ $ pnpm add c2pa-node
 This command will download precompiled binaries for the following systems:
 - Linux x86_64
 - Linux aarch64 (ARM)
+- macOS aarch64 (Apple Silicon)
+- macOS x86_64 (Intel Mac)
 - Windows x86
 - Windows ARM
 
-**Note**: macOS will be coming as soon as we add signed builds.
-
 For all other platforms, you will need Rust installed on your system, as the `postinstall` step will attempt to build our Rust SDK into a native Node.js module on your machine.
 
 ### Building custom binaries

scripts/postinstall.js

@@ -56,19 +56,14 @@ function getPlatform() {
     return 'aarch64-unknown-linux-gnu';
   } else if (arch === 'x64' && platform === 'linux') {
     return 'x86_64-unknown-linux-gnu';
+  } else if (arch === 'arm64' && platform === 'darwin') {
+    return 'aarch64-apple-darwin';
+  } else if (arch === 'x64' && platform === 'darwin') {
+    return 'x86_64-apple-darwin';
   } else if (platform === 'win32') {
     return 'x86_64-pc-windows-msvc';
   }
 
-  // TODO: Support macOS by default once we have signed builds
-  if (process.env.ENABLE_MAC_BUILDS) {
-    if (arch === 'arm64' && platform === 'darwin') {
-      return 'aarch64-apple-darwin';
-    } else if (arch === 'x64' && platform === 'darwin') {
-      return 'x86_64-apple-darwin';
-    }
-  }
-
   console.log(
     `Can not find binary for architecture: ${arch} and platform: ${platform}, attempting to build Rust`,
   );