I'm hunting around for what the original posted was asking and so much of this threat was the useless and unhelpful belittling of the original poster for asking a question the people answering do not also want to do. What a waste of time. Thanks to whoever said to try SwitchResX, as I had this problem in 2014, figured out I could solve it with SwitchResX, but ended up also finding a way to manually edit a file or setting in MacOS that isn't in any Preferences panel (probably a text file) that allowed me to FORCE which resolutions were shown as available for my monitor. This let me choose ones way larger just as people are doing with SwitchResX without dealing with the licensing issue of having my boss buy SwitchResX. The problem is, I stopped using this mac for so many years and have taken so many OS upgrades that the setting is reverted and I cannot for the life of me figure out how to change it again, to trick the OS into showing more resolutions in a custom monitor definition. If I figure it out again, I'll come back here and post it, but shame on everyone who shamed someone for wanting something odd, and shame on that one person who whined about resurrecting an old thread. If the issue is active and hasn't been completely resolved, the thread serves a purpose.