How to delete everything off your mac without disk

Once your Mac has booted into the Recovery partition, click the Utilities menu and select Terminal to launch it.

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That tells your Mac to securely erase the free space on your SSD. DRIVE should be changed to the name of your hard drive.

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Address will be used according to our Privacy Policy. Make sure your Mac is turned off. Press the power button. Immediately hold down the command and R keys. Wait until the Apple logo appears. Click Continue. Click the Erase button. Click the Security Options button.

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The Security Options window includes a slider that enables you to determine how thoroughly you want to erase your hard drive. You May Also Like.

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Tech News. Tech Tips. Now You Know. Customize Select the topics that interest you:. Pop Culture. Love and Sex. Healthy Living. We're Hiring! Terms Privacy Policy. The left sidebar shows you each of the aforementioned categories, and you can click on them to see the biggest files of that type. For example, you may find that you have multiple gigabytes of video from an old project you no longer need, or huge iOS backups from devices you no longer own.

Right-click any of these files to delete them, and you should be able to free up a decent amount of space. Just don't forget to empty the Trash when you're done—if files are in the Trash, they're still taking up space on your Mac!

If you don't have macOS Sierra, or you want to drill down even further into your system, you can accomplish similar things with a tool like Disk Inventory X. It may not be the prettiest disk space analyzer available for macOS, but it's free and offers an exhaustive list of which folders, files, and file types are hogging your hard drive. From the same Manage Storage window mentioned above, you can click Recommendations in the upper-right corner to run a few operations that may help free up space.

How to Wipe a Mac Hard Disk Drive (HDD)

For example, macOS can automatically remove iTunes movies and shows you've already watched while keeping them re-downloadable for later. You'll likely need to buy iCloud storage for this feature to be useful, though.

If you use another cloud syncing service , like Dropbox , open its settings and make sure you're only syncing the folders you need. If you have large files in the cloud that you don't access regularly on this machine—perhaps you only have them there for backup purposes—you can de-select those folders in the settings of your cloud storage app so they don't sync to your Mac. They'll still be available from Dropbox. As you investigate your drive, you may find that you have two or even three of some files—maybe you accidentally downloaded a file twice, or perhaps you added music to iTunes, but those songs also exist in their original location.

Deleting these duplicates can help free up space, especially if there are a lot of them. The best way to find duplicate files is with a third-party app like Gemini 2. It's rather expensive for a full license, but the free trial should be all you need for a quick duplicate search—just run the scan, and click the drop-down arrows next to each of the results to see which files are actually duplicates you can delete.

Moving to a new Mac?

The paid version will clean up those files automatically, while the free version makes you do it one-by-one.