This is Twitter version 4.3.2 and so I naturally thought I'd forgotten to update. A check at the App store however, revealed that I had the latest version but it hadn't been updated since March 2017. What a joke! Anyway, I've now deleted the app and will open three separate browsers for my three separate accounts: Chrome for @SeanReeves, Safari for @BabaParvardigar and Firefox for @voodooguru1949. I could use Tweetdeck to handle the multiple accounts but I noticed that it hasn't been updated in quite a while so I'm not going to take the risk. I'll stick to browsers as much as possible now and eschew OS X apps.
UPDATE: I did finally download Tweetdeck in February of 2018 and have registered all three accounts. It seems to be working fine at the moment.
UPDATE: I did finally download Tweetdeck in February of 2018 and have registered all three accounts. It seems to be working fine at the moment.