![]() ![]() ![]() It certainly would have helped me earlier. I hope this is helpful information for someone else. The results were excellent on CAD and 4K video. I havent upgraded to the public beta of Monterey because I dont want to risk losing the functionality offered to me by SwitchResX. Step 1: Check if your MacBook supports 4K resolution The first step is to make sure your MacBook supports outputting 4K signal to an external monitor. But SwitchResX can be used to easily select the correct 3840 x 2160 output at either 24, 25, or 30 Hz (or 1080p when you don't want the 4K output), and it will default to that setting each time the Mac Pro is booted up. I use SwitchResX for custom HiDPI resolutions on my M1 MacBook Air (native display) (using 1792x1120 HiDPI right now). MacBook only runs the 4K resolution at 30 Hz aka animations and mouse movement is choppy To figure out a solution, here’s what I recommend. In any event, it did not work correctly when selecting the Native setting or 4096 x 2160 in the Display Preferences. I suspect that was because of an EDID problem that could have been in the monitor or the converter. The Samsung monitor I used showed up in the Display Preferences (and About This Mac) as a native 4096 x 2160 monitor, when in fact it is 3840 x 2160 TV/monitor. I used a Kanex KIADAPT4KW,, which accepts DisplayPort 1.2 and outputs HDMI 1.4b compatible 297 MHz pixel rate signals. It can be tricky distinguishing an ACTIVE converter from a passive converter, because some passive converters say they support 4K (they do, but not from an HD 5770 video card), and some ACTIVE converters are not marketed as ACTIVE. ![]() The 1440p has VRR because it can do 144Hz. SwitchResX can show the non-scaled (timing) modes in bold. It will not output 4K at 60 Hz.Īll that's required is a $30 (perhaps less) ACTIVE Mini Display Port to HDMI converter, and possibly depending on your monitor or converter, SwitchResX, which can be downloaded for free unless you want to pay for some of its additional features. For example, my 4K display has 4 different 1280x720 modes: scaled lores (4K), timing lores (720p), scaled HiDPI (4K), timing HiDPI (1440p). For some reason the MBP insists it can only run it at 30Hz, but with a piece of software such as SwitchResX you can manually add your resolution/refresh rate combination to the list of 'supported. I'm using a Sony 43' 4k TV with HDMI 2.0 right now. The HD 5770 will output 3840 x 2160 at 24, 25, or 30 Hz with excellent results. Can I do 4K60hz with my early 2015 MacBook Pro Retina It's possible but not exactly fun. I'm not interested in playing video games, just in using a 40" Samsung 4K TV as a monitor for CAD work and viewing some 4K video. For the benefit of anyone else interested in doing it, I'm posting my results here that it does. (thunderbolt to display port) whenever i try to use switchresx to setup 4k with 50hz, i couldnt get the custom resolution active, it always indicates 'not installed' on the custom resolutions bar. I'd read conflicting reports about whether it would output 3840 x 2160 4K video, or not. i use a samsung uhd28 4k monitor with a 2014 mac mini by display port cable. I wanted an inexpensive way for my 2010 Mac Pro with original stock Radeon HD 5770 video cards to drive a 4K TV as a computer monitor. ![]()
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