I found this in another thread. This worked for me...
I was able to get it working on macOS Monterey (12.0.1) by changing this setting:
Security & Privacy -> Privacy -> Contacts: Uncheck "Message+"
You lose the contacts sync but other than that it functions.
I just updated my MacAir with Monterey 12.0.1. My Messages + app now is not working. Any HELP from Verizon would be appreciated.
Have you tried uninstalling and attempting a re-install? If it isn't compatible the App Store may tell you that. Hopefully a Verizon agent will assist here.
Another recent thread discussing this:
your response is generic for iphone and ipad .not Mac computer...the problem is on MAC computer app ...Having same issue after upgrading to Monterey 12.1. Your timely response on this is greatly appreciated. Thanks Long Time Verizon Customer for now!
Glad to be of assistance and want you to get the most from the application. How exactly is it not working, if you don't mind? -Chris
Thank you for letting us know, hearing that you are not able to use the Message+ app concerns us. We want to delve deeper into this, can you please send us a Private Message, so we can get this matter resolved? *Lisa
I have been having the same issue. When will Verizon fix this?
Upon launching the App, it crashes. A restart does not help on the app.
A restart on the Mac does not help.
An uninstall and reinstall does not help.
Crash Stats have been sent multiple times.
Same issues. Starting the app, it crashes immediately.
Verizon message+ app from the Mac Ap Store, and it didn't say anything is not compatible. On a MacBook Air M1 and macOS 12.1.
Repeat install/uninstall/reboots do nothing.
Very frustrating. Nobody seems to care or has expertise on a fix or explanation for macOS devices.