messages keeps asking for password for jabber account Apple messages keeps asking for password every time I try to log in to my jabber account.

The password is correctly saved in the keychain (in fact I just go and copy it from there each time). Save Password to Keychain is of course always checked.

I can not find Keychain First Aid in High Sierra, it seems it has been removed. I tried creating a new login keyring, removing the jabber account and re-adding it (both from Messages and from System Preferences). I also tried adding imagent and Messages.app to the authorized applications list for that Keychain entry (as suggested here).

The only weird thing I encountered is that when the problem started I had two entries in keychain for that password. Now I only have one, no matter what I do.

I also tried resetting messages by renaming away ~/Library/Messages but this led to a "message database is upgrading, please try again later" prompt.

It seems that while creating a new account saves the password in the keychain as it should, Messages fails to read it.
This solution worked for me:
https://discussions.apple.com/message/32744059#32744059


  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.