In upgrading my 4,1 single CPU, 2009 MP, I flashed to 5,1, went from El Capitan on one drive to High Sierra leaving Snow Leopard alone on another drive for now. I swapped in an x5690 and everything works great. But before I dropped the new Sapphire in and completed the upgrade to Mojave and FCPX, I’m thinking of upgrading to a dual processor; another 4,1 2009 tray and board but dual CPU that hasn’t been flashed to 5,1 yet. The question is 2-fold; is High Sierra going to reject the boot because it’s looking for 5,1 and sees 4,1...and if it does, can I then attempt the same boot with High Sierra and use that to flash up the dual CPU board to 5,1 and continue the upgrade? There are some really smart, experienced people here and I hope you’ll take the time to give me some direction.
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MP 1,1-5,1 cMP upgrade question
- Thread starter Jlames
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Flashing a MP4,1 to 5,1 changes the BootRom version which is only stored on the backplane.
The backplane and the CPU tray have a SMC version number, which is independent from flashing and stays the same .
The SMC version of the backplane and CPU tray have to be identical.
SMC version numbers:
MP 2009 4,1 : 1.39f5
MP 2010/2012 5,1: 1.39f11
In other words: If you'd like to install a DUAL CPU tray , check that the SMC version is 1.39f5
The backplane and the CPU tray have a SMC version number, which is independent from flashing and stays the same .
The SMC version of the backplane and CPU tray have to be identical.
SMC version numbers:
MP 2009 4,1 : 1.39f5
MP 2010/2012 5,1: 1.39f11
In other words: If you'd like to install a DUAL CPU tray , check that the SMC version is 1.39f5
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If you go to : about this mac> hardware info you should see this (screenshot):
There are 2 SMC numbers : 1 for the backplane , 1 for the CPU tray.
They have to be the same , in other words make sure when you buy a CPU DUAL board/tray for your MP4,1 , that it's a 4,1 CPU tray.
Flashing doesn't change these numbers.
There are 2 SMC numbers : 1 for the backplane , 1 for the CPU tray.
They have to be the same , in other words make sure when you buy a CPU DUAL board/tray for your MP4,1 , that it's a 4,1 CPU tray.
Flashing doesn't change these numbers.
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I don't get it... your question was already answered.
The dual CPU tray doesn't get "flashed" even when you flash your computer. Only the main logic board does (the "backplane" as mentioned above). You cannot put a real (2010/2012) 5,1 dual CPU tray in your flashed 4,1. If you do, the fans will run at full speed all the time. You have to find a genuine 4,1 dual CPU tray... whether it's from a flashed 4,1 or a non-flashed 4,1... for it to work in your flashed 4,1.
There are 2 ways to identify whether or not your dual CPU tray is from a genuine 4,1:
1) - the CPUs are de-lidded from the factory. This can only be seen if you remove the heatsinks.
2) - you check under "About this Mac", and then select "Hardware Info", and look at the SMC number of the tray. As mentioned above, it will be 1.39f5.
High Sierra/Mojave will not "reject" a flashed 4,1 that has a dual 4,1 CPU swapped in. The CPU tray is independent of the flashing, and does not get changed. Therefore, your question is irrelevant.
Yup; I got that but my current single CPU tray/board that did say 4,1 now says 6,1 after I flashed it up. If I buy this 2009 dualCPUtray and board, put it in my machine and boot it up, is it going to say 4,1 and need to be flashed to 5,1? Sorry for being so dense.
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Sorry, that should have read “now says 5,1”.
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Sorry, that should have read “now says 5,1”.
No. Again, your computer and the CPU tray are independent of each other. Your CPU tray identifier will never change. Even if you flash your computer.
You can flash your computer and then install any 4,1 tray without issues afterwards. It just HAS to be a 4,1 tray (from a flashed computer or not). If the SMC number of the tray is anything BUT a 1.39f5, it WILL NOT WORK.
You can flash your computer and then install any 4,1 tray without issues afterwards. It just HAS to be a 4,1 tray (from a flashed computer or not). If the SMC number of the tray is anything BUT a 1.39f5, it WILL NOT WORK.