Lost Bluetooth connection between iMac and iPhone... why or when a mystery?!
Attempts:
iPhone says '...iMac not supported'
Mac says 'iPhone not connected' . Then says 'waiting for iPhone to accept code'... no code displayed on iPhone? After several back and forth.. get message ..'Passkey mismatch'.
iMac 21.5″ 4K, macOS 12.5
Bluetooth pairing an iPhone and a Mac is not supported and has never been supported.
An iPhone will not pair via Bluetooth to a computer (Mac or Windows) or an iPad except for personal hotspot and then only if your cellular plan supports it. See the following for more information: Bluetooth: Why can't I pair my iPhone or … - Apple Community
If you are attempting to use Handoff/Continuity or AirDrop, that does involve Bluetooth but the devices are NOT paired; Bluetooth just needs to be on and the devices in range of each other. The following may help with Handoff/Continuity issues: Use Continuity to connect your Mac, iPhone, iPad, iPod touch, and Apple Watch - Apple Support
Also see Share files between your Mac and Bluetooth devices - Apple Support
Bluetooth pairing an iPhone and a Mac is not supported and has never been supported.
An iPhone will not pair via Bluetooth to a computer (Mac or Windows) or an iPad except for personal hotspot and then only if your cellular plan supports it. See the following for more information: Bluetooth: Why can't I pair my iPhone or … - Apple Community
If you are attempting to use Handoff/Continuity or AirDrop, that does involve Bluetooth but the devices are NOT paired; Bluetooth just needs to be on and the devices in range of each other. The following may help with Handoff/Continuity issues: Use Continuity to connect your Mac, iPhone, iPad, iPod touch, and Apple Watch - Apple Support
Also see Share files between your Mac and Bluetooth devices - Apple Support
iMAC & iPhone will not pair
