If your Mac is pressed for space or performance, use CleanMyMac to weed out gigabytes of files you don’t need, help reduce the number of background processes, and even scan for malware—all in a few simple steps.

What we love: How easy it is to give your Mac a checkup. Run the Smart Care scan and the app looks for potentially unneeded files—such as old caches and logs and ancient email attachments—and also scans for malware. (You can review any suggested removals before they’re deleted.) Or click Applications to scan for apps you haven’t used in months, then choose whether to remove them, along with their support files.

Quick tip: My Clutter looks for duplicate files, similar photos, old downloads, and other potential detritus. Click Large & Old Files in the results to see large videos, installers, project files, and more that you haven’t touched in a while—and optionally remove them.

Meet the creator: Founded by Oleksandr Kosovan in 2008, Mac and iOS developer MacPaw is based in Kyiv, Ukraine, and San Francisco. The company’s Apple Museum, located in Kyiv, is one of the world’s largest collections of noteworthy Macs.