Using switchresx4/17/2023 ![]() ![]() To be able to setup these custom timings, you have to disable System Integrity Protection temporarily by booting into the recovery partition. This screenshot shows you how:Ĥ3Hz was probably also possible, but 42 is the answer to life the universe and everything, so there’s that. Setting the refresh rate to 42 yields a pixel clock of 162 MHz. When sitting, disable the external monitor using SwitchResX. It looks like this is due to macOS refusing to apply monitor timings which exceed the EDID-reported maximum pixel clock of 170 MHz.įortunately, SwitchResX is able to generate new timings for reduced blanking (this is crucial to be able to drive this monitor at its full resolution in spite of its HDMI port technically not supporting this) given the resolution and the refresh rate. Mac OS X natively reads EDID information and programs such as SwitchResX or Displa圜onfigX can display the information as well as use it to define custom. Hi, I have some questions about using external monitors with a mac, can you please help. (Apple, USB-C is nice, but you really pushed it too far this time.)įortunately, using a shareware tool called SwitchResX and information from one of the comments on my previous post, this is possible.Īlthough one can import Linux ModeLine timings into SwitchResX, the previous timings refused to work. You can also add resolutions such as 2560 x 1440 60 Hz like this, but without HiDPI, your monitor will be doing the stretching so it might not look as good.In a post from 2014, I showed how to drive the sub-standard HDMI input of the Dell U2713HM 27″ UltraSharp at a resolution of 2560×1440 from the HDMI 1.3 output of a Linux-running laptop.įast forward 3 years, and I found myself having to drive the exact same monitor at its native resolution via its (sub-standard) HDMI input from a 2017 MacBook Pro through the brilliant HyperDrive USB-C dock. Back to 1080p HiDPI mode, tiny fonts even look very sharp so I don’t have to increase the size of the fonts anymore. If the screen was 38″, then it would have been useable. When used without any scaling by the OS, at UHD resolution, things became too small for normal use. I really like how sharp the text looks when using 1920 x 1080 50Hz with HiDPI. From the “Current Resolutions”, you can now select 3840 x 2160 50Hz. If you have a small 28″ monitor, I recommend using 1920 x 1080 50Hz HiDPI, which still gives full advantage of the UHD resolution. With SwitchResX it is totally easy to match your screen resolution to the. ![]() SwitchResX will install a new preference pane item for accessing all of the app's features, as well as customizing. SwitchResX will open the SwitchResX Control window with it's vast amount of options and control functions. If you are using an NVIDIA graphic card, we suggest using NiceHash QuickMiner. Luckily, SwitchResX brings all of those features back, and adds a few of its own. To access it, simply go to System Preferences and click its icon in the bottom section. After saving, reboot the machine, and you should see that this custom profile is Active now. At First Sight SwitchResX lives in the Preference Pane folder of your System Library. Quit switchResX and it’ll ask to save the settings. Note that this number shouldn’t go over 450 MHz which is the limit of the intel Iris 5100 graphics. The rest should be configured automatically, and you’ll see the Pixel clock rate of 433.36 MHz. Horizontal Active, and Vertical Active, and Vertical Scan rate. There are three boxes where you can fill the values in. In switchResX, select the monitor on the left, and on the right side you’ll see “Custom Resolutions”.Īdd a new profile by clicking the “+” sign on the bottom.Ĭheck the box for “Use simplified settings” and choose “CVT-RB v2”. I bought this cable from Monoprice for about $8 shipped. When shopping for the cable, also make sure that it is DisplayPort 1.2 and not 1.1. Using switchResX, you can create a custom profile and make the display work at 50Hz through your miniDisplayPort (which is the Thunderbolt jack). UHD resolution at 30Hz will work without a problem using HDMI or miniDisplay port, but at 30 Hz any moving things on the screen, the mouse pointer, or scrolling becomes very sloppy and choppy looking. This is my experience with Acer CB280HK 4K 28″ ULTRA HD monitor I bought through Costco for $410. Newer versions of mac software have made it more difficult to set a proper 16:9 aspect ratio for recording your screen. But before going ahead and buying one of these, you should make sure that your hardware can handle these. UHD resolution (also known as 4K) monitors are becoming more and more affordable these days.
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