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Shredder-

macrumors regular
Original poster
Jan 4, 2012
161
16
I got a 2015 15" MBP running Sierra - no complaints really - it's a solid OS and does everything I want. I'm just very intrigued by the new features in Mojave, mostly Dark Mode. My question is - if I do a time machine backup today (on Sierra), and then upgrade to Mojave - would it be easy to revert back to Sierra if I dislike Mojave? Is the downgrade a simple process, or does it include a lot of grunt work?
 
I got a 2015 15" MBP running Sierra - no complaints really - it's a solid OS and does everything I want. I'm just very intrigued by the new features in Mojave, mostly Dark Mode. My question is - if I do a time machine backup today (on Sierra), and then upgrade to Mojave - would it be easy to revert back to Sierra if I dislike Mojave? Is the downgrade a simple process, or does it include a lot of grunt work?
It can be a little tricky going back from Mojave to Sierra because of the conversion from HFS+ to APFS. You need to make preparations before upgrading to Mojave.
Here is a link that has instructions:
https://www.macworld.co.uk/how-to/mac-software/downgrade-macos-mojave-3581872/
 
The OP wrote:
"I got a 2015 15" MBP running Sierra - no complaints really - it's a solid OS and does everything I want."

Dark mode isn't "worth the [potential] trouble", in my opinion.

If you are happy where you are, with a "solid OS", you must weigh the possibility that you could end up quite "UNhappy" if the upgrade doesn't go as planned.

There's a way to provide rock-solid insurance to "get back, get back, get back to where you once belonged" if you'd still like to try the upgrade.

Here's what you need and what to do:
1. Get an external drive
2. Download CarbonCopyCloner (FREE to download and use for 30 days).
3. Use CCC to create a bootable cloned backup of your setup AS IT IS NOW (including the recovery partition)
4. Disconnect the cloned backup and set it aside for safekeeping.
5. NOW attempt the upgrade to Mojave.

IF THINGS DON'T GO SO WELL, you can do this to "get back":
1. Boot from the cloned backup of Low Sierra
2. ERASE the internal drive to Mac OS extended with journaling enabled
3. Open CCC and RE-CLONE the contents of the backup drive BACK TO the internal drive
4. Done.

Do it this way, and you'll be "right back where you started from" (in Low Sierra) -- as if you'd never left...
 
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