El Capitan Boot Screen Compatible Video Cards For Mac Pro 31

May 7, 2018 - Apple finally announced a new Mac Pro after the failed 2013 Mac Pro. Cards Compatible With macOS Mojave on 2010 and 2012 Mac Pro Models, but this. Mac Rumors: 2006/2007 Mac Pro (1,1/2,1) and OS X El Capitan. Cards will output video at the EFI boot screen, and video will not start until the.

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Since this thread came up near the top of a google search, and since I've done it before, I thought I would chime in just in case someone else looking for info sees it. My Pro 1,1 with 32GB RAM, an SSD, and an ATI 5770 runs El Cap absolutely great. The only big issue is that it uses quite a lot of power compared to a modern machine.

No, it's not as fast as a new mac, but it's totally capable of being a daily driver for most uses. You can NOT brick your machine doing this.

All you are doing is booting from a slightly modified El Cap install. There is no need to upgrade your EFI to the 2,1 roms unless you will be upgrading your CPUs. There is no need to flash your video card's ROM to a mac version. You will need a more recent video card--I use a 5770.

The process is simple. Install El Cap on an SSD/HD using another mac that does support El Cap, disable csr, and then change the boot.efi file to an alternate ( ) optionally using a script to make things easier ( ). If your video card isn't a mac version, your screen will be blank (no boot logo) until your desktop comes up, but that's never been an issue.

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You may need to fix the boot.efi file after an update, but I don't imagine that happens much any more. Other than that, enjoy! EDIT: Both my ati 5770 and my nvidia 660ti work on my pro 1,1 with ElCap. While it is true that older cards wont let you boot and only suffer a few seconds of blank screen, it is not due to a lack of EFI bios on the cards.

There isn't an EFI bios available for any 5770 afaik, and Zotac was not kind enough to provide an EFI update for my particular 660ti. I am sure of this due to working through these issues getting PCI passthrough to work with KVM/qemu with these cards on another box and having to substitute an EFI rom via a file. But, yes, if you have a pc/win card older than 2012 or so, you might need to flash for mac or find a more recent card. What you want to do is not an easy task. I'm not saying it's impossible, but you do risk bricking your machine.

I assume you have some software that requires Yosemite or El Capitan, so only you can decide whether the risk is worth it. The trick is not as much about the hardware as it is about convincing your old Mac Pro to run in 64-bit mode. That's because your Mac can't natively boot OS X Yosemite or El Capitan without a different boot loader.

I have seen a number of approaches used to get these machines to work with newer OS versions, so it's too hard to try and summarise these here. Below are some links for you to check out: • • • NOTES: • The above solutions are not without risk - including the potential to brick your machine!

• If you proceed, ensure you have a full backup of your data. • Personally, I would not bother - your machine originally launched with Mac OS X 10.4.7 and only officially supports up to Mac OS X 10.7.5 - so you can imagine how well the hardware will run Mac OS X 10.10.x or Mac OS X 10.11.x. Well, if you don't have a backup, then losing all your data would be a worse case scenario in my opinion. But, yes, it is possible you could also brick the computer.