iATKOS | United Kingdom

Thanks in advance for any help and replies.

In the past, I have successfully updated a few MBPs using OCLP.

For some reason, operator error is more than likely. This one is giving me problems.

I purchased based a new Pony USB to create an installer. I followed the instructions on OLCP and was watching a video of MacIntosh pausing between steps as I have before.

However, I get confused when more than one EFI comes up after reboot, and it's starts the pages and pages of code scrolling.

The OS on this MBP is Catalina, and I am attempting to update to Sequoia. On a couple of these models/years, which I updated, this never happened, but I am getting older and may have forgotten some things.

I believe starting over with a fresh install may be the way to go, but I am not sure about erasing the SSD hardrive totally. There is nothing on the MBP I need to keep. It will only be used with my other ones for torrenting, storing media, etc.

Should I have tried to update the older version OS and then proceed to Sequoia or Sonoma? I get confused at the point of rebooting when there are two choices for EFI one has a black card like on it, and the other does not.

I realize it is an old computer, but these are still workhorses as far as my needs on certain things.

I always upgrade ram to real-life specs for these models/years to 16g and install new SSD.

Is it possible the USB was not in the right format, or should I totally delete everything on the USB, which now contains Sequoia Installer along with the SDD harddrive.

I have never had one of the older Macs give me the huge amounts of scrolling code, then not upgrade.

Anyone who has successfully updated unsupported MBP of this time from Catalina or similar OS or has answers to what I may possibly be doing wrong or step skipping, please help if you can.

I will attempt watching the Mr. MacIntosh videos again until anyone has an answer.

Also, chime is not an option to turn off by regular actions in Catalina. So, is there a code to turn off the startup chime in the terminal? The other persons in the house are kinda getting tired of hearing it all day long while I'm working on this upgrade.

The version of OCLP I downloaded for Sequoia installers was, I believe, the newest one available on their website.

Thanks.