EDIT 1 : Now that I have finally succeeded in being able to boot my 960 EVO M.2 I strongly feel that we need a Mac Pro sticky perhaps titled "
BOOTING from M.2 NVMe SSD successes". To encourage any of our timid ( 4,1 > 5,1 ) cMP owners ( I'm not sure about 3,1 cMPs regarding NVMe M.2 ) to at least get some useful information re M.2 NVMe booting
I must admit that my initial attempts were nerve wracking but in hindsight .. no more so than making GPU EFI roms. Practice makes perfect. I'm confident that definitive M.2 NVM3 boot guides will eventuate.
Gilles first posts stated that 4k formatted M.2 blades work but he suspected that 512k formatted drives ( like amsung 960 - 970 EV's would not work .. but . . they DO work !
EDIT 2.
I offer my wholehearted thanks and admiration to
Gilles, dosdude1 and all of the others whom have had the insatiable curiosity, patience, persistence and let's face it . the sheer b%%lls to even attempt something that Apple left unfinished - Also a big "Thank You" to
Per (Sweden ) and "
bossman ( Switzerland ) for their selfless PM assistance.
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Tonight I finally had a success in being able to boot my Samsung 960 EVO 250gb M.2 NVMe into High Sierra 10.13.6 in my 4,1>5,1 cMP
I'm using an Ainex AIF-08 which comes with a niceheatsink . You can see all about it here in
Post 160 https://forums.macrumors.com/threads/pcie-m-2-nvme-on-macpro.2030791/page-7.
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Method.
1.
I installed 10.13.6 full installer which demanded the MP51.0089.B00 update to a SanDisk Z-410 250gb SATA II SSD 2,5"
2.
After the MP51.00
89.B00 update and HS 10.13.6 install to the Z-410 250 gb SSD I used
dosdude1's ROMTool to download my new '89 bootrom. I then using
dosdude1's
DXEinject injected the
MBP114_0182_B00.ffs ( the
MBP114_0183_B00.ffs simply would not work.
3.
I formatted the 960 to APFS and then did a Carbon Copy Clone of teh existing 10.13.6 install on the Sandisk Z-410 to the Samsung 960 EVO.
4.
I then again used dosdude1's
ROMTool to flash my new '89 DXE injected ootrom.
5.
Shutdown the cMP
6.
Powered ON holding down teh power button for around 15 seconds until I saw the power LED flashing.
7.
Did the cold boot up holding down the
P + R + Option + Apple-Command keys to do the
PRAM reset TWICE
8.
( I had already disconnected the SanDisk Z-410 and left only one SSD SATA II drive with Sierra 10.12.6 on it. )
Was greeted with the 960 EVO 10.13.6 listed next to the Sierra SSD.
9. First boot was little slow but subsequent boots are a little faster than the SATA II SSD.
TRIM is auto on my 960 EVO M.2.
10. CONCLUSION
Definitely DOABLE. Go slowly and carefully. Write down your particular procedure steps - tick off each one as it is completed. Drink lots of coffee.
PS : I'm using my flashed HIS HD 5870 because here in Japan we have had 39°c > 40°C temperatures where I live ( Kyoto ) for the past 10 days. My recently flashed HD 7970 can wait 'til cooler weather