diff --git a/.github/workflows/workflow.yml b/.github/workflows/workflow.yml
index a103e71a..4d05ed64 100644
--- a/.github/workflows/workflow.yml
+++ b/.github/workflows/workflow.yml
@@ -30,6 +30,29 @@ jobs:
 
     - name: Format
       run: npm run format-check
+  macOS:
+    name: Run macOS
+    runs-on: macos-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@master
+
+      - name: Set Node.js 10.x
+        uses: actions/setup-node@master
+        with:
+          version: 10.x
+
+      - name: npm install
+        run: npm install
+
+      - name: Bootstrap
+        run: npm run bootstrap
+
+      - name: Compile
+        run: npm run build
+
+      - name: npm test
+        run: npm test
   Windows:
     name: Run Windows
     runs-on: windows-latest
diff --git a/packages/tool-cache/__tests__/externals/zip-darwin b/packages/tool-cache/__tests__/externals/zip-darwin
new file mode 100755
index 00000000..60424b08
Binary files /dev/null and b/packages/tool-cache/__tests__/externals/zip-darwin differ
diff --git a/packages/tool-cache/__tests__/tool-cache.test.ts b/packages/tool-cache/__tests__/tool-cache.test.ts
index c1fb9e8f..59315e5c 100644
--- a/packages/tool-cache/__tests__/tool-cache.test.ts
+++ b/packages/tool-cache/__tests__/tool-cache.test.ts
@@ -231,7 +231,9 @@ describe('@actions/tool-cache', function() {
         ]
         await exec.exec(`"${powershellPath}"`, args)
       } else {
-        const zipPath: string = path.join(__dirname, 'externals', 'zip')
+        const zipBin: string =
+          process.platform === 'darwin' ? 'zip-darwin' : 'zip'
+        const zipPath: string = path.join(__dirname, 'externals', zipBin)
         await exec.exec(`"${zipPath}`, [zipFile, '-r', '.'], {cwd: stagingDir})
       }
 
@@ -282,7 +284,9 @@ describe('@actions/tool-cache', function() {
         ]
         await exec.exec(`"${powershellPath}"`, args)
       } else {
-        const zipPath = path.join(__dirname, 'externals', 'zip')
+        const zipBin: string =
+          process.platform === 'darwin' ? 'zip-darwin' : 'zip'
+        const zipPath = path.join(__dirname, 'externals', zipBin)
         await exec.exec(zipPath, [zipFile, '-r', '.'], {cwd: stagingDir})
       }
 
diff --git a/packages/tool-cache/scripts/externals/unzip-darwin b/packages/tool-cache/scripts/externals/unzip-darwin
new file mode 100755
index 00000000..4ef15045
Binary files /dev/null and b/packages/tool-cache/scripts/externals/unzip-darwin differ
diff --git a/packages/tool-cache/src/tool-cache.ts b/packages/tool-cache/src/tool-cache.ts
index a25cdcee..c4c71f1c 100644
--- a/packages/tool-cache/src/tool-cache.ts
+++ b/packages/tool-cache/src/tool-cache.ts
@@ -218,7 +218,11 @@ export async function extractZip(file: string, dest?: string): Promise<string> {
   if (IS_WINDOWS) {
     await extractZipWin(file, dest)
   } else {
-    await extractZipNix(file, dest)
+    if (process.platform === 'darwin') {
+      await extractZipDarwin(file, dest)
+    } else {
+      await extractZipNix(file, dest)
+    }
   }
 
   return dest
@@ -250,6 +254,17 @@ async function extractZipNix(file: string, dest: string): Promise<void> {
   await exec(`"${unzipPath}"`, [file], {cwd: dest})
 }
 
+async function extractZipDarwin(file: string, dest: string): Promise<void> {
+  const unzipPath = path.join(
+    __dirname,
+    '..',
+    'scripts',
+    'externals',
+    'unzip-darwin'
+  )
+  await exec(`"${unzipPath}"`, [file], {cwd: dest})
+}
+
 /**
  * Caches a directory and installs it into the tool cacheDir
  *