Just curious if anyone has Success fully done a clean install (not update) of Sequoia 15.4 (released March 31 2025) on any machine yet?
This is my first attempt, and I’ve gotten most of the way through, but it’s failing at the macOS install step.
I have a Mac Mini (Mid 2010) (Macmini4,1), that was running High Sierra 10.13.6. I also have a USB hub with a mouse and keyboard connected to it.
I Success fully built a USB Installer with OCLP 2.3.2 on a 64GB usb thumb drive, and Success fully booted into the EFI Boot and then Install macOS Sequoia, selecting English. I Success fully erased and formatted the Mac mini internal drive as APFS / GUID Partition Map using Disk Utility.
However, when attempting run the “Install macOS Sequoia” inside the recovery, after agreeing to the ToS, it gives me the error:
“An error occurred while preparing the installation. Try running this application again.”
I’ve tried:
- rebooting the Mac multiple times. - resetting the NVRAM - changing the port the thumb drive is connected to. - doing the above again.
But the issue persists.
Any suggestions? I’ve read of others with my Mac model Success fully upgrade an already OCLP patched macOS to Sonoma from an earlier OS, but have not seen much of Success ful clean installs.
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