When I hold "D" to run a hardware test, I am just taken to Internet Recovery. I have a mid 2012 Retina MacBook Pro and am running OSx 10.15.7.
I am having a problem with my left fan in that it runs at top power all the time; it even will run for short stints while the computer is closed & asleep. I've dusted/cleaned the fan, checked the CPU, all that.
MacBook Pro Retina
Then it can be assumed iAHT is no longer available.
Refer to About fans and fan noise in your Apple product - Apple Support.
Excerpt:
"If the fans in your Mac run fast even when it isn't experiencing heavy usage and is properly ventilated, you might need to reset the System Management Controller (SMC) on your Mac."
How to use Apple Hardware Test on your Mac - Apple Support
Try option D at startup. That forces the Internet version of AHT to load. It may or may no longer be available but try it.
Sorry, reread.
edited: same thing, takes me to internet recovery.
thanks anyhow
I can't explain it because I just tried iAHT on that model Mac and it worked. It boots Internet Recovery with its "spinning globe" icon, but then AHT loads and works as it always has.
Confirm you press and hold both option and D keys (two fingers) while you start the Mac with a third finger. Release those two fingers when you see the "spinning globe" icon with its "Starting Internet Recovery" caption.
If that doesn't work I have no explanation and can only speculate as to the cause, which won't help you.
When I hold "D" to run a hardware test, I am just taken to Internet Recovery.
