How to reformat mac os without cd

Learn how to use macOS Recovery to reinstall the Mac operating system on your built-in Decide whether to erase (format) your disk Please allow installation to complete without putting your Mac to sleep or closing its lid.
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Maybe your Mac is playing up, and you want to see whether installing a clean copy of macOS fixes the issue? You may even want to consider actively wiping your data before reinstalling macOS, especially if you plan to sell your Mac, or donate it to a lucky friend or relative.

How to clean install macOS Catalina

If you do decide to wipe the slate clean, then as soon as you encounter the macOS Utilities window, make sure you:. Your Mac will now reinstall macOS.

If you plan to sell your MacBook or pass it along to someone else, then you should quit this wizard so that the new owner can enter their own details. As long as you have an active Internet connection, you can reinstall macOS via Internet Recovery instead.


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  • Step Two: Securely Wipe Your Hard Drive (Optional)?
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  • How to Reformat a MacBook.

Your Mac is fully prepared for its new owner. We hope you found this guide helpful. Check back soon for another useful post on how to take control of your Mac — and its security.

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Installing a fresh copy of macOS via Recovery Mode

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Learn more. Here are your next steps: a.


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Choose your startup disk and click Erase. Click Erase. Never miss an update Send me exclusive offers and the best Mac tips Select the checkbox to subscribe. Group Created with Sketch.