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. You may need to fix the boot.efi file after an update, but I don't imagine that happens much any more.īoth my ati 5770 and my nvidia 660ti work on my pro 1,1 with ElCap. 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.
El capitan for mac pro 1.1 install#
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 ( ). You will need a more recent video card-I use a 5770. There is no need to flash your video card's ROM to a mac version. There is no need to upgrade your EFI to the 2,1 roms unless you will be upgrading your CPUs. All you are doing is booting from a slightly modified El Cap install. You can NOT brick your machine doing this. No, it's not as fast as a new mac, but it's totally capable of being a daily driver for most uses. The only big issue is that it uses quite a lot of power compared to a modern machine. My Pro 1,1 with 32GB RAM, an SSD, and an ATI 5770 runs El Cap absolutely great. 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.
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