FreakShow! Posted October 24, 2015 Share Posted October 24, 2015 I hope you guys can help. I have a Macbook Pro 15" (with AMD GPU). Official thing, not a hackintosh. My problem is that I am plugging it into an external monitor, via a thunderbolt to VGA adapter, which connects to a KVM, and then to the monitor. Through all of that, the EDID signal is not being passed to the Mac correctly, and so I'm only offered a choice of 800x600 or 1280x1024 as a resolution. Until now, I'd been using SwitchResX to force the correct resolution, but when I try and play a game through Steam, such as CounterStrike Source, I get a message saying that an OpenGL device could not be opened. If I run the monitor at one of the two resolutions, it does load up the game, but looks horrible. So is there an alternative to switchresx? or someway i can tell the mac the correct edid? Thanks! Link to comment https://www.insanelymac.com/forum/topic/309000-force-edid-of-monitor/ Share on other sites More sharing options...
spakk Posted October 24, 2015 Share Posted October 24, 2015 check the app FixEdid by Andy Vandijk, I hope I have you understood correctly. http://www.insanelymac.com/forum/topic/290130-fixedid-v232-application-to-generate-overrides-automatically-for-apple-displays/ Link to comment https://www.insanelymac.com/forum/topic/309000-force-edid-of-monitor/#findComment-2181748 Share on other sites More sharing options...
FreakShow! Posted October 25, 2015 Author Share Posted October 25, 2015 check the app FixEdid by Andy Vandijk, I hope I have you understood correctly. http://www.insanelymac.com/forum/topic/290130-fixedid-v232-application-to-generate-overrides-automatically-for-apple-displays/ Hi, I think you have understood. When I try and do that, I get a message telling me that: "System extension cannot be used. The system extension "/System/Library/Extensions/DisplayMergeNub.kext" was installed improperly and cannot be used. Please try reinstalling or contact the product's vendor for an update" I tried using [url="http://www.insanelymac.com/forum/topic/279450-why-insanelymac-does-not-support-tonymacx86/"]#####[/url] and just copying it in via the terminal, but same result. Link to comment https://www.insanelymac.com/forum/topic/309000-force-edid-of-monitor/#findComment-2181956 Share on other sites More sharing options...
spakk Posted October 26, 2015 Share Posted October 26, 2015 did you've to attempt to patch the driver manually. Link to comment https://www.insanelymac.com/forum/topic/309000-force-edid-of-monitor/#findComment-2182218 Share on other sites More sharing options...
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