Re. 'Sounds like the built-in Trackpad is failing which is somewhat more common with the MBPro 13" (mid-2012) models than any other model.'
> Oh dear, so it's a case of bad luck then.
Re. 'If you booted into the Apple Diagnostics you would see that you are presented with one or two questions requiring confirmation before being able to start the diagnostics. One of which is like a terms & conditions which must be accepted before proceeding further.'
> OK, will do. Thanks for explaining EULA.
Re. 'There is a physical Trackpad switch which requires physical pressure to move the Trackpad down to trigger the physical switch, but you can also configure the Trackpad System Preferences to allow Tapping if you prefer a light tap to select items.'
> That's exactly what I am looking for, 'a physical Trackpad switch which requires physical pressure to move the Trackpad down to trigger the physical switch' - thanks for the correct terminology. How do you get this to work?
Re. 'If the Trackpad issue involves moving the pointer, then most likely the Trackpad is failing which is somewhat common with this exact model laptop.
> There is no issue with the trackpad and pointer.
If the Trackpad issue only involves the physical clicking, then there could be two issues. One is dirt and/or liquid has gotten stuck around or beneath the Trackpad making it impossible for physical movement of the Trackpad.
> There is indeed no physical movement of the trackpad...
The other possibility is the physical Trackpad switch has failed.
> Is there a way of activating this physical trackpad switch? Where is it?
Since a mouse works, then at least the issue is unlikely to be due to any software issues so there must be a physical issue with the Trackpad which will need to be repaired.'
> Hmmm, ok. Do I still need to do the Apple Diagnostics?
NB. It would be easier to reply if I could do it within your text, after the relevant paragraph, instead of copying it and then replying each time. Do you know if this is possible?
Many thanks.