When I try to pair the iPhone will connect for a couple of seconds then move to disconnect.
I get a message that MacBook Pro is unsupported. Pairing unsuccessful. I have been through all of the troubleshooting guides without success.
MacBook Pro 16″, macOS 12.6
Bluetooth pairing an iPhone and a Mac is not supported.
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, and Apple Watch - Apple Support
Also see Share files between your Mac and Bluetooth devices - Apple Support
And see the information in: Bluetooth: Why can't I pair my iPhone or … - Apple Community
Bluetooth pairing an iPhone and a Mac is not supported.
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, and Apple Watch - Apple Support
Also see Share files between your Mac and Bluetooth devices - Apple Support
And see the information in: Bluetooth: Why can't I pair my iPhone or … - Apple Community
How do I pair iPhone 14 to MacBook Pro
