Why is sidecar not showing on my early 2014 MacBook air

Hi there,

Sidecar is not compatible with your device, which is why it doesn't show up on your MacBook. You can see a list of requirements for using sidecar at the bottom of this page:

https://support.apple.com/en-us/HT210380

Your mac is too old for sidecar. It requires a fairly recent mac, with Thunderbolt 3 ports.

https://www.apple.com/macos/catalina/docs/Sidecar_Tech_Brief_Oct_2019.pdf