I have a MBP 2012 and replaced the internal hard drive with an SSD and the SuperDrive with a 1TB HDD. I'm encrypting my 1TB HDD.

Should I leave my Mac on until it's done?

Does OS X pause the encryption process if I turn my Mac off (or put to sleep) or does it start over every time I turn it back on?

I'm running El Capitan 10.11.5.

  • I can't answer specifically however I'd leave it on until the encryption is done. Is there any reason why you can't leave it on until the encryption is done? Jun 20, 2016 at 4:36
  • You should probably leave it on until it's done, if it's not too much of an inconvenience. OS X should handle intermittent encryption just fine, but if it's possible leave it on. It shouldn't take too long, unless you have the HDD filled close to capacity.
    – CSstudent
    Jun 20, 2016 at 4:36
  • It was around 550 GB so it was definitely going to take a while. Jun 21, 2016 at 4:20

1 Answer 1


Not necessarily.

OS X seems to handle well pausing and restarting where the encrypting process left off.

However, there is no way I can recommend doing this. I had backups of my data and decided to try it. :) I just wish there was more official information regarding this process.

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