I have a 5,1 that I upgraded the gpu in (RX 580), and was running mojave. Now the 3d modeling software I use is no longer going to support mojave, so I have to upgrade. I used OC legacy, and made a flash drive to boot off of. Couldn't get the boot screen with the option key (cause I don't have a boot screen), so I ran a terminal command to force the boot picker screen.. Now, I have nothing. I know this is essentially 100% self inflicted. First time posting here, but hopefully someone can help me.
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5,1 no boot screen
- Thread starter immo
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What terminal command did you run?
What does the machine do now with the RX 580? You can try resetting the NVRAM by holding the Command+Option+P+R keys immediately after powering on.
If you want a boot screen in the future, check this thread.
What does the machine do now with the RX 580? You can try resetting the NVRAM by holding the Command+Option+P+R keys immediately after powering on.
If you want a boot screen in the future, check this thread.
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I guess it was this.
Command+Option+P+R will fix it.
The “problem” is that the Mac now boots into the boot picker — which you can’t see because of your unflashed GPU. You can also try just pressing Enter blindly to see if that boots macOS Mojave since the boot picker selects the current boot volume by default.
Command+Option+P+R will fix it.
The “problem” is that the Mac now boots into the boot picker — which you can’t see because of your unflashed GPU. You can also try just pressing Enter blindly to see if that boots macOS Mojave since the boot picker selects the current boot volume by default.
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Could I set my start up disk to the usb for install from the start up disk option under system preferences before rebooting to install via oclp? I want to get my boot screen working, but I'm afraid that I won't get it right and potentially brick my machine because I simply don't understand the directions well enough to go through with it.
That’s worth trying. If it doesn’t work, bring up the boot picker blindly with the OCLP drive connected, press the right arrow key once and Enter. See if it boots into OC. If it doesn’t, repeat but press right arrow twice this time. Repeat (pressing right arrow thrice, four, five times etc.) until it boots from the OC drive.
Doesn’t OCLP take care of SIP itself? The instructions don’t mention needing to do it manually.
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In the post you linked to fix the boot screen in order to use the rom dump SIP has to be disabled.
I tried blind keying over when I had my nvram messed up, but I can't get the machine to do anything other than boot normal by holding the option key during start up. I will try setting the usb as the start up disk, but will the machine boot from the regular drive once the usb is removed if it does not boot into opencore?
This page suggests you can boot into recovery using an unflashed GPU once OC has been set up. I'll say that I have no experience at all with OC though, so... dunno.
When a PPC/early Intel Mac can't find the drive it's told to boot from, it'll eventually move on to another drive.