I tried all of the solutions above: uninstall and reinstall as a new user, update using EDID, renaming the relocated items file, etc. When I upgraded to Catalina SwitchResX no longer worked and I received the "Not activated - invalid?" message. I was using SwitchResX to display 2560 x 1080 on High Sierra without issue. Thought I should share in case anyone has the same issue I did. Close SwitchResX and save when prompted.Īfter following these steps, you should be able to adjust the resolution of your external monitor through the 'Display' window in System Preferences.Adjust the settings to match the appropriate PNG provided in this gist.Add a new custom resolution be clicking the + symbol at the bottom of the window.After launching SwitchResX, select the external monitor from the list on the left.Once in recovery mode, open a terminal window.Boot into the recovery partition by pressing CMD + R when starting up your Mac.If you are running OSX 10.11 or higher, SIP must be disabled. #Disabling System Integrity Protection (SIP) For more information, including download links, vist. SwitchResX is a utility that allows users to override the default resolution settings in OSX. The Dell monitors actually look very good at that resolution - just a little soft, but definitely acceptable.#SwitchResX Settings for LG 21:9 UltraWide So instead, I run them both at 2560x1440 60hz. To get 4k resolution that way, I have to run them both at 30hz which is awful for daily use. As an aside, I do have them daisy chained when connected to a Lenovo ThinkPad w540 that only has one DP port. I tried to daisy chain them, but it isn't possible from the Mac. So I have no more display ports available, since the MacBook only comes with two. And I have to connect them both directly to the display ports. They are fantastic monitors! To make it work, I have to make sure that each monitor has MST mode turned off. The fans still come on normally and frequently when using Parallels, though. I didn't notice the fans coming on any more than normal with the monitors plugged in. I now have 2 Dell P2715Q 4k monitors and they both run in full 4k resolution at 60hz when connected to my MacBook Pro. I can't speak for certain on the 13" MacBook Pro, but I have the 15" MacBook Pro Retina (late 2013). The BIG piece of evidence against the new macbook pro's supporting 4K through the thunderbolt port is that on apple's tech specs page they specifically mention 4K under the HDMI section but make no mention of it under the thunderbolt 2 section. And the two generations of Thunderbolt technology are compatible with each other."Īlso, the Apple mini displayport support page has not been updated since 2012 but I believe it is just showing old information "Now with Thunderbolt 2 built into the new Mac Pro and MacBook Pro with Retina display, you can connect the latest 4K desktop displays and get double the bandwidth for your peripherals. Plus, on apple's thunderbolt page they specifically mention connecting a 4K display to a macbook pro through the thunderbolt port (not which is suggested by the support page listed above): My evidence of this is that on the ifixit teardown they found a an Intel DSL 5520 Thunderbolt 2 controller which according to Intel's and Wikipedia's website is falcon ridge which means it should support Display port 1.2 natively. However, I think it does include 60Hz support (although not mentioned on apple's website). I also am very confused by this because per apple's support page it only supports 4K via HDMI at 30Hz but SHOULD support 60Hz via a mini display port 1.2 specification built into thunderbolt 2.
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