iMac 17,1 Late 2015 Successful OCLP upgrade to Sequoia 15.4..rocky start but working now!

iMac 17,1 Late 2015 Successful OCLP upgrade to Sequoia 15.4..rocky start but working now!

https://preview.redd.it/a6wt9zp70pse1.png?width=1030&format=png&auto=webp&s=05259a3fa738d4d66062b0bdb98a1eca2f233841

By rocky, I mean the computer booted to a recovery screen after I first clicked the button to install the Sequoia upgrade, after having made the boot drive. probably my fault. It showed the dreaded circle+line through it, and then started to do an online recovery without prompting. That didn't take long, it then booted back into the OS, and I tried once more, this time it rebooted properly , I clicked the option+r, got the OS install options I expected to see, and a couple hours later, I'm working on a rather zippy feeling Sequoia 15.4 (mostly due to the 32GB RAM upgrade I just did..but still!)

Author: @Reaction-Consistent