Can anyone help with installing open core to install macOS 15 sequoia

[Destroyer1976]

I need serious help.

I have a 2012 mac pro. I've tried installing open core but no go.

• Dual 6 core 3.33ghz Intel CPU
• RX580 AMD Graphics
• 96GB RAM

On boot up, no screen until sign in. I have the Gop firmware installed to get a boot screen, but I don't get the boot screen.

I'm pulling my hair out trying to get the boot screen going. The machine boots but no boot screen/picker??

Any help would be great.

Duncan

 

[phunguss]

If you are using a real Mac, then you should be using OCLP (Open Core Legacy Patcher), not Open Core. OCLP 2.4 works great on real macs.

 

[Destroyer1976]

If you are using a real Mac, then you should be using OCLP (Open Core Legacy Patcher), not Open Core. OCLP 2.4 works great on real macs.

Yeah sorry, I am using that. I just didn't type the whole name.

 

[phunguss]

Did you install root patches ? What is Boot Picker Timeout set to? Have you tried it with the GOP option off? Do you have full acceleration (tansparent dock)?

 

[Destroyer1976]

Did you install root patches ? What is Boot Picker Timeout set to? Have you tried it with the GOP option off? Do you have full acceleration (tansparent dock)?

I've installed OCLP on the mac and made the USB installation and tried installing but no go?? How do I install root patches? How do I set boot picker timeout? I've tried Gop & no Gop firmware. I'm running MAC OS Mojave. I have a transparent dock.