Help on 4,1 to 5,1 upgrade

timd123

macrumors newbie
Original poster
Mar 4, 2019
19
0
UK - up North!
Apologies I posted this in the wrong place originally!


Research done and upgrade path chosen, thanks to the folks on this forum (tsialex & skizzo) however a few questions remain..


I have the Boot rom version .B08, if it all goes wrong is it possible to revert back to my original system. I've got the EFIRestorationCD1.8 firmware restoration CD from apple but this only gives me .B07. Is there a B08 restorer anywhere? (what is the difference between 7 & 8??) Is the 4,1 to 5,1 upgrade the same from .B08?

I'm going to clone my PCIE Samsung MP941 M2 SSD boot drive to a standard HDD, remove all peripherals (BT mouse etc), revert back to basic memory config, then do the upgrades. Is there anything I need to do/consider to the M2 SSD when booting from it in the updated system?

THE BIG ONE - Having watched a few videos of folks installing lidded X5690's and adding thermal pads, adapting the fan control cable etc how safe/reliable/sensible is this option. I'm tech savvy but is it a bad idea in terms of potential for things going bad!?​

What Im ultimately looking to do is upgrade to High Sierra so I can get the latest Logic Pro, which doesn't work on El Capitan (I need it as I compose professionally), and speed up the system safely and reliably, then add more SSD's from a PCIE USB3 card to get a faster setup. At least until I can afford an MP7,1 :D

Thanks!
 

bsbeamer

macrumors 68040
Sep 19, 2012
3,766
1,982
I have the Boot rom version .B08, if it all goes wrong is it possible to revert back to my original system.
For most people, this is NOT possible without help/assistance from people on this forum. Not really a way for a firmware update (BootROM) to "go wrong" unless power is killed mid-process. Even then, I'm not 100% positive the machine would fail to boot.
 
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