Sidecar error - Unable to Connect - A miscellaneous error occurred (-6709)

I had a lot of issues before getting to this error, the main reason being I hadn't realised you not only have to be signed in with the same account for both devices, but you also have to be signed into iCloud as well (I hadn't enabled iCloud on my mac). After I did that the iPad displayed as a connectable device, but I got the '-6709' error.

To resolve it I rebooted my both my mac and iPad. I then opened settings on both devices. Under my account on my iPad (just under settings at the top left) I had a notification to re-enter my username/password. Once I did that I tried again to connect and it worked.

I kept getting the -6709 error even after rebooting both devices. I fixed it by connecting the iPad to the Mac with a cable. Open a Finder window on the Mac and iPad shows up in the left sidebar as a device. I established the "Trust this device" by clicking on the connected device in Finder and confirming with a tap on the iPad. After that sidecar works.

I had this "A miscellaneous error occurred (-6709)" problem and it wouldn't go away until I enabled the iCloud Keychain on my ipad. Once enabled I was able to connect to the sidecar device.

After trying all solutions provided here, what fixed it for me was to log off my apple ID on both the Mac and the iPad, wait for a few minutes, and then sign in again first on the iPad and then on the Mac. the solution was proposed on the MacInsider website.

Exactly same thing is happening to me I have tried all possible things but I doesn't seems to connect.

Some solutions seem to work for some, others for others, and some still not at all. After several frustrating sessions of none of the solutions working for me in trying to pair 6-gen iPad with my 2017 MacBook Pro, I got a very helpful online connection with Apple support. He walked me through several tries at rechecking login, Apple-account status, etc: none worked. Finally he led me to check my settings in the user dialog: go to your login icon or name, on the drop down select "Users and Groups Preferences." On your main user page, the primary view is "password," change password. BUT click on the other button, "login items." I had two or three items show up (including a VPN auto-run item). Deleted all of these, and (after two days and several hours of trying) connected right away to the iPad under Airplay Display in monitor setting. Thanks for patient and persistent help from Apple support.

Same here. I have a 2019 iMac and a 2018 IPad Pro. Sidecar icon shows for like 2 seconds. Everytime I connect, it gives the same error as yours. Make sure Handsoff is turned on. Handsoff on my Ipad is grayed out so I can't move forward with the troubleshooting at this time. Will update if I can crack this one!

I'm using a 2017 13" MBP and 2018 iPad Pro. I had this error but managed to fix it by rebooting both devices. When I did under settings on my iPad I had a notification saying I needed to enter my credentials again to enable certain features. Once I did it all worked fine. Hopefully that helps you!

I have a 2018 MBP and 6th generation iPad. I tried all the same fixes as seen in this thread but was not able to connect.

However, I was using a VPN. When I disconnect the VPN, I am able to connect. When I reconnect the VPN, the Sidecar connection is broken.

Exact same prob, with error code 6709. Tried all solutions suggested, including re-signing in to Cloud acct. Nothing works, same error message. Is this a bug in Catalina? Or an issue with certain wireless setups? Seems like it should be a bluetooth connection. Response from Apple would be nice

Adding more info:

I have a 27`` 2015 iMac (which is supposed to be supported) and an iPad Air(3rd gen). That same iPad was paired successfully with my other Mac, which is a Macbook Pro and Sidecar works perfectly. However when trying to enable SideCar on the iMac, I get the infamous -6709 error with the following appearing in the logs:

kextd: (Security) SecTrustEvaluateIfNecessary
hidd: (IOKit) [com.apple.iohid:default] Service added: IOHIDService name: id:0x7fae19b20a80000b primaryUsagePage:0x1 primaryUsage:0x2 transport:Virtual reportInterval:0 batchInterval:0 events:0 mask:0x0
SidecarDisplayAgent: (libsystem_info.dylib) Membership API: translate identifier
SidecarDisplayAgent: (Security) [com.apple.securityd:security_exception] UNIX error exception: 17
kextd: (Security) SecTrustEvaluateIfNecessary
SidecarDisplayAgent: (Security) [com.apple.securityd:security_exception] UNIX error exception: 17
SidecarDisplayAgent: (Security) [com.apple.securityd:security_exception] UNIX error exception: 17
rapportd: (CoreUtils) [com.apple.rapport:RDLinkCnx] 12: PairVerify next (12 bytes)
rapportd: (CoreUtils) [com.apple.CoreUtils:CUPairingSession] RDLinkCnx-12: ### Pair-verify client state 4 failed: -6709/0xFFFFE5CB kStateErr

Any ideas?

Thanks!

2019 iPad Pro and 2017 MacBook. Turned both on and off a couple times and it still didn't work. Signed out and back in to iCloud on both. Still didn't work.

Turned off both again and also my phone and watch.

Works now.

Thanks! This is the only thing that worked for me. Tried lots of other options in this thread. I stopped getting the -6709 error as soon as I deleted the pending "login items" in the "User & Groups" settings.

could you please explain what you did in steps ?

Thanks for the hint! Mine worked after I turned on the iCloud Keychain on the mac