Then click on the "Scan" button, iMyMac-PowerMyMac will start scanning the duplicate files on your iMac/MacBook. The scan process will show the percent on the left side.
You can press the "View" button to check the scan results.
The scan results will show the percent of the duplicate file types. And it also counts the total number of the duplicate files.
Click on the file type that shows in the scan results.
Then you will see the duplicate files. You can preview the files and choose which file you want to delete.
Simply tick it and click on the "Clean" and "Confirm" buttons.