Universal Control No Longer Working Between Macs after update to Ventura 13.3

APPLE PLEASE ADDRESS THIS ISSUE AT YOUR TOPEST PRIORITY. WE ARE JUST SO TIRED OF SOMETIME WORKS SOMETIME DON'T SOLUTION. SUCH AS REBOOT ALL DEVICES AND SIGNOUT/SIGNIN ICLOUD.

Here is what I did to fix it.

[ I was using universal control between my M1 MacBook Pro and iPad Pro. After I close the screen of MacBook and open again, the universal control was gone. I used to log-out & login my iCloud account to fix it, but this time I'd like to find an easier way. ]

I open System Settings and click my Apple ID at the top left corner. On the bottom of the right pane is Device which lists the devices bounded to my Apple ID. I click the iPad Pro and it will show the information of that device. Nothing to do here, except maybe just clicking the back arrow, and the universal control comes back quietly.

Very simple. No need to log-out/log-in your iCloud account.

You may try if this works for you.

I opened a case with Apple to have this looked at. While discussing with an engineer, we weren't able to correct this. However, he suggested I create a new login on EACH computer, log in with these IDs and connect them to my AppleID. I did this and nothing changed. UC was enabled by default but not working. After a few minutes, I logged back in with my "regular" accounts.

After a few minutes of being logged back in, UC started working again! I suspect that there's something going on with UC and our AppleIDs but I can't say that with any certainty.

Best of luck to you all and I hope this fixes the problem for you.

I logged out of iCloud account (Apple ID) on both iPhone and MacBook, logged back into iCloud on MacBook first then did so on my iPhone. After logging back in on iPhone the MacBook then requested my Apple ID password again (notification in settings) to "finish setting up Apple services", also requested phone password. Once this was all done clipboard started working again.

This worked for me! Thanks for relieving what had been a few hours of frustration. I did find that it was necessary to shut down the iPad and the Mac and start them back up again (I think I started the iPad first, but am not sure it would make any difference). Something to keep in mind for others: If you have several devices (Macs, iPads, iPhones) when signing back in to your Apple ID, you will be asked to provide your device credentials for each device you would like to sync. For example, I have an older MBP which is on the same Apple ID. I needed to enter the ID for my current MBP and the older one (as well as for iPhone, iPad, etc).

Now let's see how long it continues to work.

Did everything. Firewalls, toggling Bluetooth on and off, wifi, shutting down each system, firewalls, turning on and off handoff/airdrop etc nothing worked.

In the end, I signed out of iCloud on the machines, tuned off the computers and back on, then signed back in, turned on and off, then finally it worked.

Apple ID Solution appears to Work (Log out > Log in).

After updating to Ventura 13.4, UC stopped working completely between an M1 Ultra Studio, M1 Max MacBook Pro & 2017 iMac Intel i7. Everything was perfect before.

After the update to 13.4, UC ceased to function for Apple (M) Chip devices. M Chips could then only connect to the iPad Pro, not to each other or the iMac. The iMac, however, COULD connect to each M Chip devices and the iPad Pro (ha!)..but then, it stopped too.

After several back-and-forth conversations with Apple Support, they could not correct the issue. I almost gave up until I discovered this thread. Attempting all the solutions here, the one that worked for me was simply Logging Out of Apple ID and Logging Back in. ...for good measure, I rebooted each device (iMac took longer), and they all started 'talking' to each other again.

Viola!

Update: I'm now using Synergy.

Update!!!! I spoke too soon. As soon as I closed down and went back the next day it would not work. I am not going to try again, it is a waste of time and is very frustrating. This is a big fail for Apple developers and Apple over all.

Like I said, The days of "IT JUST WORKS" are over at Apple.

I logged out from my iCloud accounts and then logged them in again and it start working again

Try signing out (and in again) from Facetime on your Mac.

That fixed it for me, never had any issues ever again.

It worked for me, thanks mate :)

Perfect. Thank you.

Without signing into the apple id on devices, universal control simply does not work. This should be clearly mentioned in the official UC manual to avoid any hassle. Thanks

Log out and login worked for me