diff --git a/src/lib/helpers/files.test.ts b/src/lib/helpers/files.test.ts
new file mode 100644
index 0000000000..1e27a7b8af
--- /dev/null
+++ b/src/lib/helpers/files.test.ts
@@ -0,0 +1,25 @@
+import { describe, expect, it } from 'vitest';
+import {
+    DEPLOYMENT_ARCHIVE_EXTENSIONS,
+    getInvalidDeploymentArchiveReason
+} from './files';
+
+describe('deployment archive extensions', () => {
+    it('should include the compound tar.gz extension for the file picker accept attribute', () => {
+        // On macOS a bare '.gz' accept token does not match 'code.tar.gz' files
+        // (compound tar+gzip UTI), greying them out in the picker.
+        expect(DEPLOYMENT_ARCHIVE_EXTENSIONS).toContain('tar.gz');
+        expect(DEPLOYMENT_ARCHIVE_EXTENSIONS).toContain('gz');
+    });
+
+    it('should accept .tar.gz archives and reject other files', () => {
+        const ok = [new File(['x'], 'code.tar.gz')];
+        expect(getInvalidDeploymentArchiveReason(ok)).toBeNull();
+
+        const upper = [new File(['x'], 'CODE.TAR.GZ')];
+        expect(getInvalidDeploymentArchiveReason(upper)).toBeNull();
+
+        const zip = [new File(['x'], 'code.zip')];
+        expect(getInvalidDeploymentArchiveReason(zip)).toBe('invalid_extension');
+    });
+});
diff --git a/src/lib/helpers/files.ts b/src/lib/helpers/files.ts
index 1efd2319ef..6c4b95e219 100644
--- a/src/lib/helpers/files.ts
+++ b/src/lib/helpers/files.ts
@@ -80,6 +80,16 @@ export async function gzipUpload(files: FileList) {
     return uploadFile;
 }
 
+/**
+ * Extensions accepted for manual deployment archives.
+ *
+ * 'tar.gz' must be listed alongside 'gz': the file picker `accept` attribute is
+ * built from these extensions, and on macOS a bare '.gz' token does not match
+ * 'code.tar.gz' files (their UTI is the compound tar+gzip type), so the picker
+ * greys them out.
+ */
+export const DEPLOYMENT_ARCHIVE_EXTENSIONS = ['gz', 'tar.gz'];
+
 export function getInvalidDeploymentArchiveReason(
     files: FileList | File[] | null | undefined,
     maxSize?: number
diff --git a/src/routes/(console)/project-[region]-[project]/functions/create-function/manual/+page.svelte b/src/routes/(console)/project-[region]-[project]/functions/create-function/manual/+page.svelte
index f49a5ded72..daf6b76311 100644
--- a/src/routes/(console)/project-[region]-[project]/functions/create-function/manual/+page.svelte
+++ b/src/routes/(console)/project-[region]-[project]/functions/create-function/manual/+page.svelte
@@ -22,7 +22,8 @@
     import {
         getInvalidDeploymentArchiveReason,
         InvalidFileType,
-        removeFile
+        removeFile,
+        DEPLOYMENT_ARCHIVE_EXTENSIONS
     } from '$lib/helpers/files';
     import { isCloud } from '$lib/system';
     import { humanFileSize } from '$lib/helpers/sizeConvertion';
@@ -224,7 +225,7 @@
                 <Upload.Dropzone
                     bind:files
                     title="Upload function"
-                    extensions={['gz']}
+                    extensions={DEPLOYMENT_ARCHIVE_EXTENSIONS}
                     {maxSize}
                     required
                     on:invalid={handleInvalid}>
diff --git a/src/routes/(console)/project-[region]-[project]/functions/function-[function]/(modals)/createManual.svelte b/src/routes/(console)/project-[region]-[project]/functions/function-[function]/(modals)/createManual.svelte
index 0ae9ada858..f18fc12ea0 100644
--- a/src/routes/(console)/project-[region]-[project]/functions/function-[function]/(modals)/createManual.svelte
+++ b/src/routes/(console)/project-[region]-[project]/functions/function-[function]/(modals)/createManual.svelte
@@ -7,7 +7,8 @@
     import {
         getInvalidDeploymentArchiveReason,
         InvalidFileType,
-        removeFile
+        removeFile,
+        DEPLOYMENT_ARCHIVE_EXTENSIONS
     } from '$lib/helpers/files';
     import { addNotification } from '$lib/stores/notifications';
     import { IconInfo } from '@appwrite.io/pink-icons-svelte';
@@ -93,7 +94,7 @@
             Upload a tar.gz file containing your function source code
         </Typography.Text>
         <Upload.Dropzone
-            extensions={['gz']}
+            extensions={DEPLOYMENT_ARCHIVE_EXTENSIONS}
             bind:files
             {maxSize}
             required
diff --git a/src/routes/(console)/project-[region]-[project]/sites/create-site/manual/+page.svelte b/src/routes/(console)/project-[region]-[project]/sites/create-site/manual/+page.svelte
index 46dc627892..9111a20b88 100644
--- a/src/routes/(console)/project-[region]-[project]/sites/create-site/manual/+page.svelte
+++ b/src/routes/(console)/project-[region]-[project]/sites/create-site/manual/+page.svelte
@@ -19,7 +19,8 @@
     import {
         getInvalidDeploymentArchiveReason,
         InvalidFileType,
-        removeFile
+        removeFile,
+        DEPLOYMENT_ARCHIVE_EXTENSIONS
     } from '$lib/helpers/files';
     import { humanFileSize } from '$lib/helpers/sizeConvertion';
     import { isCloud } from '$lib/system';
@@ -219,7 +220,7 @@
                     Upload a tar.gz containing your site source code
                 </Typography.Text>
                 <Upload.Dropzone
-                    extensions={['gz']}
+                    extensions={DEPLOYMENT_ARCHIVE_EXTENSIONS}
                     bind:files
                     {maxSize}
                     required
diff --git a/src/routes/(console)/project-[region]-[project]/sites/site-[site]/deployments/createManualDeploymentModal.svelte b/src/routes/(console)/project-[region]-[project]/sites/site-[site]/deployments/createManualDeploymentModal.svelte
index 6c99e20911..a9cbae8d53 100644
--- a/src/routes/(console)/project-[region]-[project]/sites/site-[site]/deployments/createManualDeploymentModal.svelte
+++ b/src/routes/(console)/project-[region]-[project]/sites/site-[site]/deployments/createManualDeploymentModal.svelte
@@ -6,7 +6,8 @@
     import {
         getInvalidDeploymentArchiveReason,
         InvalidFileType,
-        removeFile
+        removeFile,
+        DEPLOYMENT_ARCHIVE_EXTENSIONS
     } from '$lib/helpers/files';
     import { addNotification } from '$lib/stores/notifications';
     import { uploader } from '$lib/stores/uploader';
@@ -93,7 +94,7 @@
             Upload a tar.gz file containing your site source code
         </Typography.Text>
         <Upload.Dropzone
-            extensions={['gz']}
+            extensions={DEPLOYMENT_ARCHIVE_EXTENSIONS}
             bind:files
             {maxSize}
             required