Troubleshooting the macOS upgrade
These are some steps to help fix the issues Apple is having with the latest macOS upgrades to 12.6.
- Open System Preferences > Software Update. Confirm that no update is available, and leave the window open.
- Open Applications > Utilities > Activity Monitor.
- Go to View > All Processes.
- Search for and select com.apple.MobileSoftwareUpdate.UpdateBrainService
- Click Force Quit.
- The 12.6 Update should appear in System Preferences > Software Update. Click Upgrade Now.
- The update might not download, if so, force quit the com.apple.MobileSoftwareUpdate.UpdateBrainService again using Activity Monitor to start the download.