MP 1,1-5,1 High Sierra and Snow Leopard, same drive, two partitions

[vworks]

Hi!


I currently have 2 partitions on my ssd in my mac pro 4.1 (->5.1) - one with El Capitan, one with Snow Leopard.
I would like to upgrade the El Capitan partition to High SIerra to test the system and if I like it and my applications run well, to keep it.

I have some software running as well on Snow Leopard. I want to keep it also.

Question :

Can I directly upgrade (I have a copy of High SIerra dmg on my drive) to High Sierra and keep Snow Leopard in the 2nd partition?
Or APFS will convert the WHOLE drive and I will not be able to keep Snow Leopard partition in HFS like that?

(I don't want to fromat the whole drive to AFPS and make HFS partition after, this is something I would like to avoid.)


Thank you and sorry if I did not post in the right section...!!

 

[MarkC426]

You can keep HFS in High Sierra.
There is a thread somewhere about what you need to do, you have to run it from terminal otherwise it will change to APFS.

 

[majus]

You can keep HFS in High Sierra.
There is a thread somewhere about what you need to do, you have to run it from terminal otherwise it will change to APFS.

Interesting, in that when I went from Sierra-->High Sierra it was just a routine upgrade. HDD format was not changed, nothing run from Terminal.

 

[vworks]

You can keep HFS in High Sierra.
There is a thread somewhere about what you need to do, you have to run it from terminal otherwise it will change to APFS.

I think I saw that (terminal commands) a while ago. So the installer will change the WHOLE drive, not only the partition where I am installing High SIerra?
[automerge]1578846369[/automerge]

Interesting, in that when I went from Sierra-->High Sierra it was just a routine upgrade. HDD format was not changed, nothing run from Terminal.

Because the disk is HDD not SSD.

 

[Roadrunner2]

May be you can install HS on an external HDD and clone it with CCC to your SSD. I am not sure if this will work, never tried it.

 

[MSastre]

Rather than having different partitions for each OS on the same drive. I much prefer having different drives running each different OS. Easy enough to swap and boot up with using a dock such as this. I have several of these that I use all the time. OWC also has some bundled deals right now with the dock plus a hard drive.

 

[MarkC426]

Much like MSastre says, I have never put multiple OS’s on one drive.
That is the beauty of the macpro, room for expansion.
Plus if your drive fails, you can still boot to the other OS if it’s on a separate drive.

No reason to go APFS, just stick with HFS then no issues (but this needs to be done from Terminal, and it’s easy.... )