i activate bluetooth on both devices and try to pair them. The pairing fails and I get the message "Macbook air is not supported". Th ese two devises used to be paired quite easily in the past.
Bluetooth pairing an iPhone or iPad 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: Work seamlessly across all your devices - 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 or iPad 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: Work seamlessly across all your devices - 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
my iphone and my Mac book air do not connect via Bluetooth. I have th elatest OS on both. I get the message "Mac Book Air is not supported" on my iphone.
