AirPods 3 not connecting (iMac mid-2011 21", AirPods 3)

Hello

I own an iMac 2011, it runs Sequoia really well cause the GPU has been updated but I can't seem to make my AirPods 3 works. I tried to reset the NVRAM and put them into pairing mode but everytime I click "connect" on the bluetooth pane it shows the grey spinning wheel and after 10-15 seconds the bluetooth desactivate and reactivate. My Magic Keyboard and Trackpad have no problem connecting and work really well. Have someone managed to make their AirPods work with OCLP? thanks