I managed to create a 4K display in BetterDummy and mirror from M1 MacMini to the screen on my 27 iMac and whilst this worked and everything was crisp the performance was pretty much unusable.
#BETTERDUMMY MAC MAC#
Now I can plug my Mac into my KVM switch and use this monitor on Mac just like I always could with Linux and Windows. This just isn’t working even with the excellent BetterDummy. So I went down to the Apple Store and bought a Mac Studio M2 Ultra the day I read that. So, I don't know why they didn't make this work on the M1 Ultra, too, but Apple gonna Apple. More details are in the linked GitHub discussion. That 8K monitor apparently needs support for something called "dual SST" and Apple never supported that in their software.
#BETTERDUMMY MAC FULL#
I don't think it is scaling, per se, but rather that Apple has never supported the full DisplayPort spec.
#BETTERDUMMY MAC PRO#
And the M2 Ultra on a Mac Pro or Mac Studio can drive 3 of them. This technique allows all Macs (including Apple Silicon) to have any HiDPI 'Retina' resolution on any display you use. Then I found this GitHub thread where it was revealed that M2 Pro can drive up to one of these 8K displays over Thunderbolt (to DisplayPort). BetterDummy creates a virtual display which you can utilize as a mirror main for your display on the Mac. I had a MacBook Pro M1 Max that couldn't drive this monitor at 8K. They quietly changed this with the M2 machines. The only 8K monitor has for years been the Dell UP3218K, which uses DisplayPort - and requires two DisplayPort cables, actually, to get 7680 × 4320 at 60Hz.Īpple has never supported this on any of their machines - they just couldn't drive the monitor. You can contribute to the code.No, HDMI 2.1 doesn't matter (yet) because there are no 8K desktop monitors (meaning 32-inch size or similar) on the market that use HDMI.
#BETTERDUMMY MAC CODE#
The basic idea and some of the code was adapted from FluffyDisplay. If you like this app, you’ll like MonitorControl even more! Control the brightness, volume of your external display like it would be a native Apple display! Special Thanks
You’ll see a long list of available resolutions – select the desired resolution.In the app menu choose Connect Dummy and select your desired aspect ratio.Does not utilize graphics hardware in vain so it is somewhat faster.Works with all aspect ratios, does not depend on what resoluations are recorded in the dummy’s EDID/firmware.Offers a much wideer variety of HiDPI and standard resolutions.Does not suffer from issues that prevalent with the physical dummy route (like jittery mouse cursor).Your HDMI port will remain usable for an other display.To alleviate this problem, DummyDisplay creates a virtual dummy display for you which you can then utilize as a mirror main.Īdvantages of BetterDummy over a physical 4K HDMI dummy plug: This approach has obvious drawbacks (you need to buy a dummy, you render your HDMI port useless etc.) To fix this issue, many resort to buying a 4K HDMI dummy dongle to fool macOS into thinking that a 4K display is connected and then mirror the contents of this dummy display to the physical lower-res display in order to have HDMI resolution. Notoriously they don’t allow sub 4K resolution displays to have HiDPI (“Retina”) resolutions even though a 22″ – 24″ QHD display would greatly benefit from having an 1920×1080 HiDPI mode. M1 macs tend to have issues with custom resolutions. Dummy Display for Apple Silicon Macs to achieve custom resolutions.
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