upgrading mac pro 2009 4.1 flushed to 5.1

[sebo2001]

Hi All,

I have Mac Pro 2009 4.1 flushed to 5.1 with 2x 3.4Ghz CPUs, 512GB OCZ SSD with OSX 10.2.6, upgraded last night from 10.10.5 without any issues.

I was going to upgrade to 10.13.5 but I read somewhere all computers with SSDs are getting forced to APSF file systems.

I also have OWC Mercury Elite Pro Quad RAID and I’m afraid my SoftRAID will not work with new OSX and APFS file system, they say it can read APFS volumes but cannot create etc, next version 6 will be able to fully support APFS.


Does anyone have experience with upgrading MAC PRO flushed from 4.1 to 5.1 to 10.13.5 ? At the beginning of the OSX installation I’m getting message my firmware has to be flushed, I’m kina reluctant since I already have 5.1 if 10.13.5 flashes my firmware to something new my dual core CPUs might stop working/booting etc.

 

[omvs]

Hi All,
Does anyone have experience with upgrading MAC PRO flushed from 4.1 to 5.1 to 10.13.5 ? At the beginning of the OSX installation I’m getting message my firmware has to be flushed, I’m kina reluctant since I already have 5.1 if 10.13.5 flashes my firmware to something new my dual core CPUs might stop working/booting etc.

Yes - I've updated my Mac Pro 4,1 (flashed to 5,1) with a single socket 6 core cpu successfully, and I remember it did update the firmware, though this was back in 10.13.1 or 10.13.2. I wouldn't expect the dual-socket to be any different.

You can prevent the APSF file system migration, though I can't remember the exact steps - there should be instructions somewhere on the web. Though to be honest I'm not even sure my mac pro is running APFS. I don't remember it doing the migration -- while it definitely migrated when I update my rMBP to 10.13.x