> I just got MAMEUI64 0.149 and I want to test lots of ROMs, but those garbage screens
> that ask me to type "OK" always pop up on the first run.
> Is there any way to make skip them automatically?
Not with that old version.
Upgrade to the latest, and the popup no longer exists.
Also, in your mame.ini, make sure skip_gameinfo is set to 1.