My 27 inch iMac late 2012 model doesn't recognize its thunderbolt ports any more after I upgraded OS X to 10.10.5, currently 10.13.6. The System report states "Thunderbolt: No hardware was found." The thunderbolt ports were last recognized by 10.10.3.
I did SMC and PRAM. Self diagnose test...
Hello
My Thunderbolt 1 port connection has ceased working on my Mac Mini (late2012) - presumably the Thunderbolt connection stopped working since updating from Sierra OS to High Sierra OS. In the meantime, I have reverted back to El Capitan OS - but still, there is no Thunderbolt connection.
I...