Macworld How to verify your Mac’s drive health using Disk Utility Using the First Aid function in Disk Utility. body> It's a good idea to check on the health of your Mac's internal storage on a regular basis. You can do this using Disk Utility, an app that comes with every Mac. To run the check, you need to boot the Mac into Recovery Mode. On Intel-based Macs, restart your Mac and hold down Command-R on the keyboard. On M1 Macs, shut down the Mac, then press and hold down the power button as it boots. When your Mac is in Recovery Mode, it will display a window with the available recovery utilities. Click on the bottom option, Disk Utility, and this will launch the Disk Utility app. Follow the steps below to check your storage device for errors and to fix them. (The rest of these instructions are performed using the macOS Big Sur version of Disk Utility. Other versions work the same way, but the interface may look a little different from the screenshots shown below.)