"Device Timed Out" error in Sidecar

Hello,

I turned off the handoff for both devices, signed out and back in of my icloud and I still cannot connect both. It keeps saying "device timed out".

Any additional suggestions?

Thank you. This worked for me.

Something related to the Today View must be causing the initial time out issue. I had "do not disturb" on, turned it off, and it connected to the iPad. Turned back on do not disturb and seems to be working at the moment. This was after signing out of iCloud on both devices, rebooting and signing back it ... and it still not working. Though before signout, the option to see the iPad didn't appear at all. After signing out and back it, at least the option appeared in the Display dropdown, but then the time out issue occurred. Messing with the Today View seemed to unhitch the problem for me.

Apart from the list mention in https://support.apple.com/en-us/HT210380

Make sure you don't have any VPN software running and connected to a VPN. Took some time to realised that i had connected to my company vpn on my mac and a private vpn on my ipad. once I turned both off. everything started working.

MacBook Pro A1707 & the first iPad Pro 12.9'

Side car did not work at first and each time I tried I ended up with a "device timed out" error. I tried signing out and in to Apple ID, changing the pass and all these handoff, today view and light/dark mode tricks on iPad. Neither of them worked so I decided to reset settings and what finally worked was :

step 1. Reset the settings on iPad

Settings>General>Reset All Settings

step 2. Sign in to Apple ID on iPad

(wasn't working yet it was still showing -6079 error something like this)

step 3. Sign out and in to Apple ID on iPad

So far it works

Awful bug anyway

@ncfirechief , thank you for your advice. After working on this issue for weeks, your solution helped in combination with many of the above listed steps. I disconnected from wifi on both devices, reconnected to wifi, connected the devices via Bluetooth and the issue was resolved. I am currently typing this on sidecar. I hope it is a long-term fix. I hope this helps someone else!

After trying every suggestion I found on the web, this solved my problem:

Go to iPad settings, at the top of the menu under your apple id, there is a warning which says ''update apple id settings''.

After clicking on it and following the instructions, sidecar worked for me, wirelessly.

Hope that helps

I was able to get Sidecar to work after restarting both the 2019 iMac and the iPad Air 3 and sign out/in of Apple ID.

Go to System preferences > Accounts > iCloud and turn on keychain. It will likely ask you to change your password. Give it five minutes and it should work again.

Make sure you turn off your VPN while trying to connect sidecar. I turned mine off and it fixed the problem. Even while pugged in.

Worked after restating MacBook pro! Thanks you