I have ALREADY tried:
- Within the System Preferences/Accessibility: De-Select Flash the screen when an alert appears.
- Toggling Select then back to De-Select
- While I found the solution to delete: ~/Library/Preferences/com.apple.universalaccess.plist - 10.8.5 replaced Universal Access with "Accessibility", which has no apparent equivalent file within the Lib/prefs. If there IS, please let me know.
I really hate the white flash. REALLY hate it.
BTW: I did do my own research before asking this question, including on this AskDifferent website. The solution found on AskDifferent and other sites only work on older Mac systems (up to ~ 2011). The ones with UniversalAccess.
Thanks, in advance for any useful input. - Scott