Duplicates on your hard drive could be slowing down your Mac. Luckily it’s easy to find and delete them. You can use the Finder or make the process even simpler with one of the best apps for finding duplicates on a Mac.
If your Mac is starting to run slow the first thing to check is if you are running low on space. It’s generally advised that you should have 10% of your total space free on your Mac for the most optimum working. If you are down to your last few GB then it’s time to do some house work and grab yourself some space back.
Over time, a Mac is likely to accumulate a large collection of duplicate files that take up this valuable space so that’s a good place to start. However, finding and deleting them can be time-consuming if you do it one by one, so in this article we show you quicker ways to cleanse your system of these delinquent doppelgängers.
Why do I have duplicate files?
In most cases these will be mistaken downloads (caused by clicking on a link twice), Mail and Messages attachments, a convoluted filing system, a bad habit of dragging things to your desktop, or a number of other possibilities. Unless you’re an unusually fastidious Mac user, duplicates are going to turn up one way or another.
Read more at MacWorld.com