MP 1,1-5,1 OCLP seeking for help.

[cdiepenheim]

Dear all,

I have a Mac Pro 2009 and has multiple bootable disks, main NVME is running Mojave and a other disk is with OCLP Monterey and my goal is making my NVME booting (Clean install I prefer) with Ventura or even better Sonoma.
I watched some YT OCLP guides and started that.
And what i do I cant install another clean disk to even Ventura or Sonoma.
I have used 1.21 OCLP and have used / prepared with the OCLP App a bootable NVME USB disk with multiple boot partitions (Monterey / Ventura / Sonoma).
They all are starting / booting and installing from recovery but after the many reboots at the end is failed and cant boot the installed disk what I tried to make ..
Get on screen error with the sign on it.

I get in the bootpicker all menu choices/ my old working partitions / 3 x install OSX version what i type above and EFI.

What should go wrong? Or is there a great trick how to do it.
or Is it better I do the OSX upgrade off the Monterey working NVME disk and go to Ventura and then Sonoma ? Is that better?

Somebody has ideas what is going wrong?
Thx all.

 

[Macschrauber]

if you get the forbidden sign it's either a not matching board ID or some filesystem error.

Boot verbose (cmd-v at boot or when selecting the OS) to get meaningful verbose text output.

OpenCore must be loaded first. If not renamed, it's EFI Boot on the boot picker. This is the bootloader, and the bootloader boots the unsupported OS.

If you try to boot unsupported OS directly from the native Apple boot picker you will get the forbidden sign.

 

[cdiepenheim]

Hey hi Macschrauber, thx for your fast reply and explain. I did some more homework better reading and started over again. Somehow I messed up some Boot parttions now on my NVME and try to solve it. I did manage making a triple partioned booting USB and even NVME external drive with Monterey Ventura and Sonoma for I like to choose to install. I did make a clean install on a clean SSD drive with Monterey just for testing I understand the proces better. I must now recover / repair the main NVME booting partions (there is one who is relative important to get it back. Not a big worry I use a Mac Studio M1 for main work and have backups )and try to install Ventura on a diff disk or partition with OCLP. I shall post more after.

 

[cdiepenheim]

Sofar did it again and it seems Monterey is going flawless . Ventura and Sonoma isn’t going with OCLP.
in the more final steps it wont work with finishing the installs. Tried clean install upgrades all failed.
Did not tried yet removing all installed disk and put in a clean one and start over. I do soon.