Installing HS on System with FileVault Previously Enabled

Smoothie

macrumors 6502a
Original poster
Jun 23, 2007
615
341
California
I'm running Sierra with FileVault enabled on my 2017 iMac with an SSD. FileVault is also enabled on an external mechanical hard drive that contains my Time Machine backups. Will the High Sierra installation maintain the encryption of both drives? Does it have to re-encrypt the drives?
 

Weaselboy

Moderator
Staff member
Jan 23, 2005
30,441
10,247
California
They will remain encrypted and will not need to be re-encrytped.

I went through this exact upgrade myself.
 

prisstratton

macrumors 6502a
Dec 20, 2011
534
121
Winnipeg, Manitoba, Canada
I went through a similar procedure when I upgraded from Mavericks to High Sierra. The only thing that has left me wondering is if the recovery key changed at all during this process. I was not given any type of notification one way or the other, I can only assume that it remains the same as previous.

Can anyone please confirm this, thank you.
 
Last edited:

KALLT

macrumors 603
Sep 23, 2008
5,136
3,183
I went through a similar procedure when I upgraded from Mavericks to High Sierra. The only thing that has left me wondering is if the recovery key changed at all during this process. I was not given any type of notification one way or the other, I can only assume that it remains the same as previous.

Can anyone please confirm this, thank you.
The recovery key does not change. You can verify it using this Terminal command:
Code:
sudo fdesetup validaterecovery
 
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