This helped
After running a comparison with a working version (on Sierra 10.12.6) it looks like the solution (at least for me) is to change the Where value that gets generated on sign in from what gets populated when adding an account in High Sierra com.apple.account.jabber.password to Jabber
In order to make this change follow these steps:
- Open Keychain Access
- Search for com.apple.account.jabber.password
- Double click it to open the attributes prompt
- In the Where field (fourth one down) you should see com.apple.account.jabber.password
- Replace all text in that field with Jabber
- Click Save Changes
After making this change the first launch of messages asked me to allow permission to access keychain. After doing so any subsequent open of messages works as expected.
+ for commercial accounts (G Suite) you need also ensure you set this one:
I get the same error. Here is my fix
Open Keychain Access
Search for com.apple.account.jabber.password
Double click it to open the attributes prompt
In the "Account" field iMessage feed automatically "xxx.xxx@gmail.com@talk.google.com"
Replace all text in that field with only "xxx.xxx@gmail.com"
Click Save Changes
Plus there is one tip.
When setting non-commercial account (simple gmail account) and Auto Discovery of the server is on it uses gmail.com as default one and TLS which will pop up a windows informing us that the login & password are sent insecure. TLS is by default on. You can avoid that changing server from gmail.com to talk.google.com there SSL on port 5223 works. macos - messages keeps asking for password for jabber account - Ask Different
Source: macos - messages keeps asking for password for jabber account - Ask Different
