Again, non Apple sanctioned hardware can cause compatibility issues. Similarly, make certain that your original Mac hardware (or at least officially Apple supported hardware) is what is running inside the computer. Attached peripherals can sometimes cause compatibility issues. Although some have reported success with upgrading firmware on the 2007-2008 Mac Pros, we did not test this and cannot state for certain that these steps will function for you.īefore performing the upgrade, make certain that you do not have any unnecessarily attached USB devices plugged in. Secondly, the firmware upgrade performed in these steps are specifically for a 2009 Mac Pro. If you Mac Pro was installed to boot into 32-bit mode for 32-bit drivers for some hardware then this will make that hardware unusable as it defaults into 64-bit mode. If you absolutely cannot have a non-working Mac Pro, then do not perform this upgrade. Note that upgrading your firmware could result in a dead system if performed incorrectly. Do you have an older model 2009 Mac Pro (pre-Trash Can Mac Pro) that could use a makeover? Updating your firmware could give you added benefits such as the ability to install faster processors, faster memory, and newer macOS versions.
