Hi
Yes, that's possible with a workaround.
You need 2 disks and CarbonCopyCloner (there's a free 3months trial version )
Install Mojave on disk 1 ,which will be APFS.
After having all installed and running, clone disk1 to disk 2 formatted as HFS+.
Disk 2 will be your main disk .
In case of an update you will have to clone disk 2 to disk 1 , update disk 1 and clone it back to disk 2.
HFS+ works fine with Mojave as long as you dont install (security) updates.
It's recommended to keep disk 1 uptodate(=regularly clone your main drive disk 2 to disk 1) just in case ...
That's all.
CCC reports that there are errors in some files and does not copy anything.
[automerge]1598082178[/automerge]TBH I've been using CCC for years and never had this error report ...
Are you using the latest CCC version 5?
Maybe this thread contains some clue (look at e.g. post #116), you could also post your issue there:
![]()
Is it possible to install Mojave and keep HFS+ ?
Catalina boots and runs on HFS+, but there have been reports of some incompatible apps. I’ve not had any trouble myself but I haven’t used it as my daily driverforums.macrumors.com
Just updated from Sierra to Mojave - feared the worst , pleasantly surprised
Definitely faster and so far very stable - impressed
I've had problems with Mojave more than I had with High Sierra. Luckily I have my drives Carbon Copied so the backup doesn't take long. But I feel it needs more tweaking still.Mojave is considered one of the most stable OS
. . . Luckily I have my drives Carbon Copied so the backup doesn't take long. . . .
Right now...Mojave is buggy to me still. I didn't update to the 04 firmware fix because in HS the 04 firmware created instability to that so I still have HS on the previous 03 firmware on a backup drive as a last resort.
There is one big bug I noticed in the screen saver , I had to do a forced restart after the system crashed - first one in 5 years ! . . .
If you install a patched OS on a Mac that natively supports it, IMHO don't be surprised about instability and/or other issues...
If I understood well, your MP is running the MP51.007F.B03 firmware.
This is the original version for a MP 5,1 from 2010 when it left the building in Cupertino...
Since then there have been several Firmware updates , and believe me or not, an FW update comes with (several) advantages and makes your MP less vulnerable, while still compatible with any older OS back to 10.6.8
The 04 firmware you mention is unknown to me.
This means you installed HS as a patched version too.(i.e.DosDude/Clone from another Mac) ,otherwise the BootRom would be MP51.0089.B00...
I've been using CCC for years and never had any issues whatsoever and I guess it might have to do with native installing the OS as meant by Apple.
The statement that Mojave is considered one of the most stable OS, is based on the assumption that it's installed "by the book".
I installed Mojave the regular way and no patch needed because my rig is the original 2010 5.1 macpro. Also my bootrom is the latest one and not the original firmware. It runs HS fine without their latest security 04 update which came out the same time the update for Mojave tells me its avail, but Im waiting for more feedback on it.