How to Recover an Overwritten File on a Mac (4 Steps)

Open the folder where your overwritten or deleted file was located in the Finder. If it was on the Desktop, simply close all other windows.
Select 'Enter Time Machine' from the Time Machine (backwards-running clock) icon in the Applications folder. Alternatively, if you have the Time Machine icon in your dock, simply select that.
Click the up arrows or a point in time on the bars at the right to 'travel back in time' -- that is, to see how the folder looked in the past. Locate the file(s) or folder(s) you want to restore.
Click 'Restore.' If your file was deleted, it will be restored to your drive. If it was an older version, your Mac will ask you which version you want to keep -- the original (newer file), both files, or if you want to replace the original (newer file) with the older one. Make your decision and proceed.
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How to Recover a Mac Desktop (7 Steps)

Open Time Machine. Click the 'Go' at the top of your screen and click 'Applications' from the drop-down menu. Double-click the 'Time Machine' icon to run the program.
Scroll through your previous backups. Select the backup you wish to restore according to the date. Click the 'Desktop' folder and click the 'Restore' button at the bottom of the screen.
Press and release the 'Command' key and the 'Q' key simultaneously to close the program.
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