After upgrading to macOS Monterey, Sidecar disappeared from my iMac

The function still exists. But they simply removed it as a separate icon in Sys Pref. Now it's housed under DISPLAYS in SYS PREF. Click ADD DISPLAY and you should be able to see your iPad as an external monitor. Choose it and sidecar function gets activated. I think they have remapped it this way to prepare for Universal Control. Should have given users the heads-up. I almost downgraded my OS back to Big Sur if I had not discovered the hidden sidecar.

I had this problem when my Mac was connected with a VPN (ExpressVPN). Turned off the VPN, the option came back.

Thanks for the solution with deinstalling Cisco.

After update to Monterey noticed that have no opportunity to sidecar monitor to iPad. Situation was the same, - app TV OK, but no one iPad.

Also i have noticed that Cisco Anyconnect provide some problems to me not only for mac pc, but windows pc also.

Shame on Cisco.

I wanted to share my specific solution because I had this issue while using ExpressVPN on my Macbook Pro w/ Monterey (Intel Core i7). At first, I couldn't use my iPad as a second display when I disconnected the VPN (not uninstalled, just disconnected). Per the advice from Rasmus above, I deleted ExpressVPN from the Macbook completely and re-connected my iPad as a second display (control panel > screen mirroring > display preferences) which worked! I still want to have the VPN, though, so I then re-installed ExpressVPN to test whether it would work after re-establishing the connection with the iPad, but while connected to the VPN server (same location on both the Macbook & iPad) I could no longer connect to the iPad. However, now once I disconnected the VPN (not uninstalled), the display worked. Now I can still have my VPN on the computer but just have to disconnect when I want to use the second display.

I followed your advice and uninstalled Cisco Anyconnect and my sidecar started working. Surprisingly, I have now re-installed Anyconnect and sidecar still works. I am happy that I can do both now. Maybe they updated it.

This is an MacOS issue reported on FB9755027. If you open a case with Apple you can reference FB9755027

I was having this problem too. After updating my iPad it seems to have been resolved.

I'm seeing the same issue, in addition to my iPad Pro not being shown as a selection option to connect to for screen share. When I screen share to my iPad Pro, the screen becomes frequently frozen, preventing me from using my keyboard or mouse. The only method I've discovered to resolve this is to disconnect and reconnect it, but the issue will recur around every 30 minutes. Is it possible to resolve this?

I also have AnyConnect installed, and am still able to set my iPad Pro (11inch M1) as a display. My version of AnyConnect is 4.10.01075. I did have to connect via USB-C the first time to see the iPad, but can now connect wired and wireless. n

I can connect wired regardless of VPN connection status as well. However in order to connect wirelessly, I do have to use AnyConnect to connect to the same VPN.

In my opinion the AnyConnect uninstall answer should not be marked as the solution, since it is still possible for myself, and maybe others to add an iPad Pro as a display in Monterey with AnyConnect installed.

Even with the new location, it sidecar does not work with my iPad. My 1 year old IMAC recognizes the Ipad, but can not connect, wirelessly or with adapter. this confirmed on my THIRD service call with Apple. Only solution for me is to go back to Big Sur.

I just had this problem where my 2018 iPad Pro could be turned-on as an extended monitor but no Finder items (cursor, windows) would show on its desktop. It looks like it was Parallels Remote Access interfering with it. I quit PRA and I can now use the iPad Pro as an extended display just fine. I'm running Sidecar on my M1 MacBook Pro.

Sidecar is missing from my full version of Monterey. I have used Displays but it does not connect consistently. Very frustrating.