![]() How do you use the defaults command to modify /Library/Preferences instead of ~/Library/Preferences or /private/var/root/Library/Preferences?."multiRefreshRateScaledModes" works for all displays. The "appleMultiRefreshRateScaledModes" preference is applied only to Apple displays (vendor code 0x0610). It works! Now SwitchResX sees all the refresh rates of the base resolution for each scaled resolution and its corresponding HiDPI mode resolution. Sudo cp ~/Library/Preferences/ /Library/Preferencesand restarted. Using Hopper Disassembler, it's easy to see that they are used as preferences. I noticed a string "appleMultiRefreshRateScaledModes" and "multiRefreshRateScaledModes" in 10.14.6 (not in 10.14.3) for the CoreDisplay framework. The ability to run different refresh rates for a scaled mode is probably in the user code and should not depend on the individual graphics card drivers (those kernel drivers have the resolution and refresh rate that you want, you just need to find out how to get the user land code to use that for a HiDPI mode). Apple might have hidden some stuff in newer versions of those files, so also check older OS versions. These are user land code, not kernel code, so maybe they can be modified to do what you need. "tovr" is for adding "Standard resolutions".Ī lot of the code that uses those is in IOGraphicsLib.c and IODisplayLib.c at. "IODisplayEDID" is for custom timings that don't go into "dspc". "DisplayProductName" is for custom product name option. "scale-resolutions" is for scaled custom resolutions. "DisplayPixelDimensions" is for the "Scaled resolutions base" option. "default-resolution" is for the "Startup resolution" option. Here's a list of the options that SwitchResX modifies: Strings /System/Library/Frameworks/amework/CoreDisplay ![]() Grep -R DisplayPixelDimensions /System/Library/Extensions /Library/Extensions /System/Library/Frameworks Then check the Custom Resolutions tab to see if the graphics driver accepted the new custom resolutions. When using SwitchResX, instead of using Activate Immediately, you might consider just Saving changes to the custom resolutions, and restarting. SwitchResX will create a new file for you when you press Command-S to save your changes. You can recreate the scaled resolutions in SwitchResX. Now that you are using SwitchResX, you should delete the file you made. If you need 5 or more external displays, then you should try an eGPU (expensive) or DisplayLink (cheap). The MacBook Pro can have four displays connected besides the built-in laptop display. DisplayLink is cool if you really need another display and don't have any more display ports. You can connect DisplayLink adapters or docks to a USB port of a Thunderbolt Dock if you still want crappy video. A Thunderbolt dock can support two 4K 60 Hz displays which are powered directly by your graphics card (like the displays are connected directly to your MacBook Pro) instead of DisplayLink. Since you have a Thunderbolt port, you should get a Thunderbolt dock. ![]() Now I just have to figure out why when using DisplayLink monitors, the Music app pauses between every new song.Building a CustoMac Hackintosh: Buyer's Guide not sure why if it works by manually forcing it with RDM that the native DisplayManager software can't make it work. I have more cables and StarTech adapter coming that specifically says "compatible with Mac". M1 doesn't detect 1440p like before, RDM allowed me to bypass and select the desired resolution. I moved from a 2018 MacBook Pro and am using the 6950 Plugable dongle on an OWC dock. Just to share, just incase u r nervous after getting your brand new M1 but monitor resolution disappoint you Issue : after install display link manager 1.2, the monitor only limit the max resolution to 2048x1152 which is not usable Monitor Philip 32" 2k display (model forget) Hi, just to share how I resolve limited resolution selection for M1 MBAĭock : Dell D3100 (bought USB type B 3.0 to type C)
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