when i enter terminals commands etc and hit TAB (file name completion) the whole terminal window flashes rapidly (if there is no unique filename for example). This is not good since for some people this can trigger a seizure, and for me it causes really bad headaches. Is there a way we can disable this flashing?
Uncheck the 'visual bell' box in the preferences for your terminal style.
This is probably not the right place to ask this question. But there is a setting for that: Settings/Advanced/Visual bell
Step (1) - Disable Visual Bell
Terminal > Preferences > Profiles > Advanced > Bell
Uncheck the "Visual Bell"
Step (2) - When Audible Bell is still enabled and screen continues to flash
System Preferences > Accessibilty > Audio
Uncheck the "Flash screen when alert sound occurs"
If anyone is using iTerm2 and having this problem, try going into Preferences->Profiles->Terminal and check "Silence Bell".