Time Machine Icon on Desktop showing the yellow icon

To fix this I went into Get Info for the external drive and under the "Preview:" section it showed the TM icon, which I clicked and dragged to the top of Get Info and it overlayed the yellow icon.


For me it fixed by following these steps:

  • Go to System preferences > Time Machine
  • Go to Select Disk...
  • Select the disk which is showing yellow icon
  • Start the backup

This will remark the disk as Time Machine Backup and macOS will change the icon to the Time Machine green icon.