Which should you choose? The key point is that disks formatted as APFS won’t be recognized by Macs running versions of macOS older than High Sierra. If your Mac is running macOS High Sierra or later, you have two options for file formats: APFS and Mac OS Extended. You can download CleanMyMac X for free here. It’s specifically designed to securely delete sensitive data and will render it unrecoverable. If you have confidential files or sensitive data you need to remove from your Mac completely, you should use CleanMyMac’s File Shredder. Tip: You don’t need to erase a whole drive to delete files securely. However, it also increases the time it takes to format the drive quite considerably. The further to the right you move the slider, the more ‘passes’ the erase tool will make and the more securely files will be deleted. Choose a security level using the slider. If you have previously stored sensitive data on the drive, click the Security tab.Ĩ. Choose a format from the dropdown menu.ħ. In the window that drops down type a name for the formatted drive in the box next to Name.Ħ. Click on the USB drive in the sidebar and then choose Erase from the toolbar at the top of the window.ĥ. Once you’ve copied any files you need from the USB drive to your Mac, go to Applications>Utilities and double-click on Disk Utility.Ĥ. The process of reformatting it will wipe all the data from it.ģ. Make sure it has no files on it that you need. Open a new Finder window and click on the drive. Plug the drive into a USB socket (if you have a recent MacBook or MacBook Pro that only has USB-C connectors, you’ll need a USB-C to USB-A adaptor).Ģ. It’s exactly the same procedure if you need to reformat a flash drive on a Mac. So, if you’ve bought a USB drive that’s formatted as Fat32, or any other format other than Mac OS Extended (also known as HFS+) or APFS, here’s how to format a USB drive on Mac. Drives formatted as Fat32 can be read from and written to by macOS, but it’s not optimal and you’re more likely to run into problems than if you use macOS’ native format.

That’s because most of the computers in the world run Windows, and Windows uses a different file system, usually one known as Fat32. However, unless it’s been designed for use with a Mac, it won’t be formatted using macOS’ preferred file system (either Mac OS Extended or APFS, depending on which version of macOS you’re running). Nowadays, when you buy a USB drive, you can use it right out of the box with your Mac.

Test it out in a free version and head over to the tips below.įeatures described in this article refer to the MacPaw site version of CleanMyMac X. This is our app that cleans old caches, system junk, and large hidden files. If you want to erase all unwanted files from your macOS, download CleanMyMac X.

How to reformat macbook air 2017