I have the same problem. It is not a monitor issue (tried disconnecting). This problem happened for me in the middle of working. It worked fine on one file. Then I opened another file and could not right click...but now the entire program will not right click. I updated my mac and adobe, rebooted, and started with a fresh file. Still no right click.

The only wild theories I have on what caused it are 1.) I was connected to a separate keyboard with two computers on my desk. I typed something on one keyboard (for the other computer) and accidentally typed it on my mac that has adobe. I thought maybe I accidentally typed some hidden keyboard shortcut for turning off right click, but cannot find this to be true in any settings. Is there a keyboard shortcut that would disable right click only in adobe? 2.) the second file I opened had font issues, again, a long shot.

I got in touch with support and I had to delete the preferences file.

Try this first:
Launch Illustrator > Click on Illustrator > click on preferences > Click on performance and turn off GPU performance.

Try This second:
We have to reset the application preferences. Doing this will remove all of your custom settings
Please save your file and close all Adobe application.

Please close all Adobe related processes in Activity monitor (Creative cloud, Core sync, CC library, services for Adobe desktop app, Adobe desktop service, Adobe IPC broker, AAM updater).

Now, please click on Go > go folders and type "~/library" > click on preferences folders, there you will find

Adobe Illustrator 22 setting, please rename it to Adobe Illustrator 22setting.oldIn the same folder you will find Adobe folder, please open it there you will find Adobe Illustrator, please rename it to Adobe Illustrator.old

Now please open Creative Cloud Desktop application and sign in after that please launch illustrator and check is it working fine for you?

You can just hold CTRL while clicking . command on mac

I have 2 monitors and I'm working off a Mac. Could not figure out why my right click only worked sometimes. Then realized it only works on my right monitor!

I have a 2 monitor set-up. RIght click works only on the startup monitor, not the 2nd monitor. That's some weird business.

Hi,

Sorry for the inconvenience caused. Can you please share you monitor details. Are using a 4 k machine? On which version of Illustrator are you working on now? Please share this details it may help us to reproduce the issue .

Regards,
Ritika
Illustrator team

What is the point of these community post if no one from Adobe ever comes in to help or answer our questions???

i have the same problem, I work on Mac OS and have 2nd monitor connected - if i disconnect this and use only IMac there is no problem... but i want use two displays at the same time :/