If you attach a non-Apple external display, you might find fonts look a little faint or gritty because the font antialiasing hasn’t been correctly set. The fix is easy—open a Terminal window (Finder→Applications→Utilities→Terminal) and type the following, logging out and back in afterward for the changes to take effect:
defaults -currentHost write -g AppleFontSmoothing -int 2
Should this method not work for you or if you’re unhappy with the results, open a Terminal window and type the following, logging out and back in again for the changes to take effect:
defaults -currentHost delete -g AppleFontSmoothing
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