[Richard Whitehead]

Hi John,

Thank you for your reply, and it achieved success.

The reason for the convoluted path that I took was to have minimum changes (avoiding Yosemite to El Capitan), and to get a working system on to the 7200 rpm disc, rather than the 5400 rpm disc that Apple supplied. I had not realised that OS X would put El Capitan on to the Yosemite restored disc, instead of the original OS, and I suspect that was the cause of the no-boot problem.

I erased both 1Tb discs, and downloaded El Capitan from the net, on to the 7200 rpm disc. Then I did a Migration from the Time capsule on to the new disc. All now works just fine. I did a Carbon copy of the new system to my (now spare) 5400 rpm disc, so I feel happy to continue with confidence.

I think that I’ve still got some of the Windows mindset, where one makes very small moves in the OS, cuz a
lot of the utilities don’t work…

Cheers!

Richard