Bluetooth Apple keyboard just gets spinning wheel and will not connect to 2015 Macbook Pro

fosterdesignllc Said:

"Bluetooth Apple keyboard just gets spinning wheel and will not connect to 2015 Macbook Pro: 2015 Macbook Pro detects bluetooth keyboard only after I hold the power button in on the keyboard and I get the flashing green light. Then, I get the spinning wheel forever and it will not connect; thoughts?"

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Troubleshooting Mac Bluetooth:

A. Try "Reset the Bluetooth Module":

See my User Tip: Use "Reset the Bluetooth module" to Fix Constant Bluetooth Disconnections - User Tip, Looking at my first comment on it, recommended to Apple that they bring this option back. They discontinued it on even macOS versions.

What else to do:

Try the following, in the order provided...

B. Boot in Safe Mode:

[Hold Down: shift key, upon boot], In Safe Mode, Login Items do not run at login, certain preferences are set aside, and damaged system files are then reset. So, once booted in to Safe Mode, wait for 30 seconds, and then boot up normally, attempting another sync.

C. Try a New Admin User:

What happens when you create a new administrator user, and log int it? Do you still get this error? If not, then it is likely an error with the current user. If so, then it is likely an error with your macOS.

as a last resort...

D. Reinstall the macOS:

Go Here: How to Reinstall macOS from macOS Recovery - Apple Support

Important: First, Back Up your Mac:

Create a Time Machine backup of your Mac, so that you can have something to restore your Mac from, should anything go wrong with the reinstall. Take this as a learning experience, knowing to always create a backup of your Mac, prior to making any major changes to it (i.e. update installation)