Thanks!, 12.3b working like a charm!. I just needed to get the latest ver of the TUI app. I should know this by now! lolThe latest OCLP build from the source fixed the boot loop for my iMac11.3 with Xeon 3470. Some systems suffer only a throttled CPU, others do not boot at all. Please get ready to use development builds following the way as described on the OCLP GitHub page.