Since I have High Sierra installed, I cann't send iMessage. It shows "Not delivered", but incoming messages works properly. I did try to turn on and off iMessages, restart, activate two factor authentication, but it still doesn't work.
Mac mini, macOS High Sierra (10.13)
Good troubleshooting guide for this issue here. I did nearly all of the things suggested, and even sent logs in to Apple Support for further investigation.
Ultimately, what worked for me was to run this command from Terminal:
sudo rm /Library/Preferences/com.apple.apsd.plist
Thanks. Where, exactly, do I do that. :-)
Did not work for me.
Worked for me as well.
Worked great — Messages works again. Thanks so much!
Pls do the update. It solved my problem.
High Sierra won't send iMessages
