Wiping an old MacBook before selling

I have just wiped my old MacBook before selling and have reinstalled OS X. How can I make sure it is definitely cleared of all my information? It is a MacBook air early 2015 with OS X Yosemite 10.10.5. Thank you.

Posted on Jan 29, 2021 10:12 PM

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20 replies

Eau Rouge

Level 8

42,678 points

Jan 30, 2021 12:10 AM in response to AJWNZ21

Does Erase Free Space become available.

Eau Rouge

Level 8

42,678 points

Jan 30, 2021 12:29 AM in response to AJWNZ21

It is on your screenshot.

OS X Base System is your connection to Apples Recovery Servers, you can eject that.

Are you booted up to your Recovery Partition.

AJWNZ21 Author

Level 1

8 points

Jan 30, 2021 12:35 AM in response to Eau Rouge

The eject tab is greyed out too. Sorry I am a bit techno phobic and am not sure what a recovery partition is. I just have my mac book open to the screen I took the screen shot of (in disc utility).

AJWNZ21 Author

Level 1

8 points

Jan 30, 2021 1:30 AM in response to Eau Rouge

Thank you for all your support. I have just done all that and 'security options' is still greyed out and it is not possible to select it.

AJWNZ21 Author

Level 1

8 points

Jan 30, 2021 1:47 AM in response to Eau Rouge

You have been fantastic, thanks so much for all your advice. I will have a think about what you have said. Cheers.

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Wiping an old MacBook before selling