Hello, Jithin,
Thank you for your several suggestions. Unfortunately booting with "dart=0 -f -v -x" produced similar results. One variant: the final verbose entry is "ucode: no updates in safe mode"
Before I venture down the laborious road of complete reinstallation, I would like to ask about using my last good backup to restore to my problem SSD.
After successfully upgrading from 10.10.3 to 10.10.4 two weeks ago, a Carbon Copy Clone of my main drive CMYos0 SSD above was made to my 1st internal backup drive, an HDD CMYos1.
Using UniBeast USB thumb I can still boot into the clone CMYos1; it is not problematical. I also have another internal CMYos4 which is the same clone, and everything works fine there, too.
Therefore I would like to:
1) boot into CMYos4 in order to allow CMYos0 and CMYos1 to be unmountable & better suited to a clone restore
2) reformat the SSD CMYos0
3) use CCC to clone CMYos1 to the erased SSD CMYos0.
My question if you know: In doing this, are there any files or directories on the clone on CMYos1 that I should NOT allow to be cloned back to the original CMYos0 ?
If you don't have a suggestion on this, could you advise which forum I should choose to ask the question? Still Yosemite support? Or?
thanks for your time & ideas