My wife’s 2015 (just out of extended warranty!) MacBook Pro Retina 13”, High Sierra 10.13.6, boots fine but the built-in keyboard and trackpad are not connecting. We can connect an external BlueTooth keyboard and a Logitech external wireless mouse, but the built-in keyboard and trackpad don’t work.
It seems like the internal keyboard/trackpad controller has stopped working for no apparent reason. We’ve had no power issues. The MacBook is fully charged and all power systems appear to be working.
We’ve tried various solutions found through Google and Apple Support articles, but holding various keys on either the built-in or wireless keyboards while booting doesn’t work because the built-in keyboard doesn’t work, and it appears that the wireless keyboard is not active during that phase of the boot.
Here’s what we’ve attempted hoping something would work anyway, but so far no joy.
Booting in Safe Mode
Resetting the SMC
Resetting the PRAM
Booting from an external SuperDuper backup: Strangely, after booting from the backup we couldn’t see the SSD in the Finder or the Startup Disk Preference panel to switch the boot drive back. It showed up in the Disk Utilities app list of drives but was unmounted and I couldn’t figure out how to get it mounted. When I rebooted holding Option on the wireless keyboard it did boot into the Startup Manager with both the SSD and the external drive available and I could select the SSD to boot from. This seems to show that the wireless keyboard was being read early in the boot process, so now I’m very confused about why Safe Mode didn’t work.
Any suggestions for how to proceed would be appreciated.