Unable to drag windows on the desktop after upgrading to macOS 27

Troubleshooting: Unable to Move Windows Around the Desktop After Upgrading to macOS 27

If you can resize windows, drag icons inside them, click buttons, and drag items to the Trash, but can't move a window around the desktop by dragging its title bar, it sounds more like a macOS window-management issue than a problem with your mouse or trackpad.

Here are a few things I'd try, starting with the simplest fixes.

1. Start with the simplest fix. Choose Apple menu > Restart and let your Mac restart normally.

Once you're back at the desktop, try dragging a Finder window by its title bar.

2. Check whether it happens with every application

• Open Finder and try dragging its window by the title bar.
• Try the same thing with System Settings.
• Test a few third-party apps, such as Chrome.

This will help determine whether the problem affects macOS itself or just certain applications.

3. Check your Accessibility settings

Go to: System Settings >> Accessibility >> Pointer Control >> Trackpad Options

If you're using a trackpad, check the dragging settings. If dragging is enabled, try temporarily turning it off and testing again.

Also, if you're running any third-party window-management utilities, try quitting them temporarily.

Apple's instructions: Turn on three-finger drag for your Mac trackpad.

4. Test in Safe Mode

Safe Mode starts macOS with only essential system components and helps identify whether third-party software loading at startup is causing the problem.

To start in Safe Mode:

• Apple silicon (M-series Macs): Shut down your Mac. Press and hold the power button until startup options appear. Select your startup disk, hold down Shift, and click Continue in Safe Mode.

Once logged in, open Finder and try moving a window around the desktop.

What the results tell you:

• If window dragging works in Safe Mode, a third-party application, login item, or startup extension may be responsible.

• If it still doesn't work, the problem may be related to macOS itself or another system-level setting.

5. Test with another user account

This is another very useful diagnostic step. It helps determine whether the problem is specific to your existing macOS user profile or affects the entire system.

1. Go to System Settings >> Users & Groups.
2. Click Add User (you may need to authenticate).
3. Create a temporary Standard user account.
4. Log out of your current account and sign in to the new account.
5. Open Finder and try dragging windows around the desktop.

What the results tell you:

• Works in the new account: The problem is likely related to your original user profile, its settings, login items, or background applications.

• Still doesn't work: The problem is more likely system-wide, involving macOS, its configuration, or possibly input handling.

You can delete the temporary account after testing.

6. Check for macOS updates

Since this started after upgrading to macOS 27, it's worth checking whether Apple has released a subsequent update that addresses the problem.

Go to: System Settings >> General >> Software Update

Install any available updates.

Apple's instructions: Update macOS on Mac.

7. Try logging out and back in

Sometimes window-management problems can occur after using features or applications such as:

• Universal Control
• Remote Desktop
• Chrome Remote Desktop
• Other remote mouse-control software

A simple logout and login may restore normal window dragging.

After upgrading to macOS 27, window-dragging issues can stem from system bugs, third-party window management or mouse utility apps, or accessibility drag settings. Definitely this is not normal behavior. Apple's documentation is here and works as described on macOS 27.2.

Move and arrange app windows on Mac

How to Fix Window Dragging in macOS 27

• Disable or update third-party mouse/window tools: If you use apps like Mac Mouse Fix, BetterSnapTool, Rectangle, or menu-bar managers, they may conflict with macOS 27 window management. Try disabling or quitting these applications via Activity Monitor or their menu items to see if dragging returns.
• Check trackpad/mouse drag settings: Sometimes system updates reset pointer options. Go to System Settings > Accessibility > Pointer Control > Trackpad Options (or Mouse Options) and check if "Use trackpad for dragging" (or three-finger drag) needs to be toggled off and back on.
• Restart the Finder and WindowServer:
  • Click the Apple logo () and select Force Quit, choose Finder, and click Relaunch.
  • Alternatively, restart your Mac to clear out temporary window-server glitches

If restarting does not work, then see if the problem is present when you boot in safe mode. That process performs some system cleanup and clears caches, and also disables 3rd party extensions that may cause problems.

Start up your Mac in safe mode - Apple Support

If that does not correct the issue, test in a new user account. A newly-created user account will have all settings at default, and if the issue does not occur in that new account then it provides guidance on what may need to be changed to correct the issue.

Add a user or group on Mac - Apple Support

Once the testing is complete, the new account can easily be deleted.

Delete a user or group on Mac – Apple Support

Those steps will help to isolate the problem.

It might help to download and run EtreCheck, written by a long-time forum member. The free version is fine. Post the full report using the Additional Text button. No personal information is revealed. 

Yes, happening here as well for the last update or two. Upgrading to the latest OS 27.2 has resolved the issue for me so give that a try as soon as it's available to you.