Whether you have limited ports on the new MacBook Pro or onboard graphics limitations with the Mac Mini, you start to run into issues as soon as you want to add more than a few displays to your new Apple computer.According to the article, iMac (Retina 4K, 21.5in, Late 2015) supports 3840×2160 at 60Hz using a Mini DisplayPort to HDMI adapter via Thunderbolt Adapter.I tried plugging it in but the audio input did not work. I am looking for a video capture device/software that my Mac Mini will recognize and send these images to iMovie, Photos or some other editing software.Over the past few years, Macs have been a little tricky to add multiple monitors to. It out puts S-video, RGB composite and what looks like SDI (BNC connector). I have a Elmo TRV 35H video slide changer. What I don't want to do is unload a dozen 80 slide carousels.For instance, if your TV supports HDMI input, then try to use it as an external monitor for troubleshooting. If it is a newer Mac Mini and relatively newer TV, just plug in an HDMI cable to the Mac and plug the other end into.If you don’t have another device with HDMI output, you can use a device with HDMI input. It features four Thunderbolt 3 ports and an HDMI port, and according to Apple, up to “two 4K displays, and a third on the HDMI port”.It depends on the Mac Mini and your TV. What I have is the Mac Mini mid 2007 model.The 2018 Mac Mini showed great promise after going 4 years without an update. The specs page I referred to above is about the latest Mac Mini. Update: I think I've got what the problem is.
![]() Apple sells eGPUs in their store, and the manager told me that I wasn’t able to add a 4th display as well when the solution to my problem was 10 feet away on the shelf.The eGPU enclosure that I linked above came in the mail, and I was able to hook up all four of my displays to my RX580. One senior advisor even told me over the phone that the info I was requesting on adding a 4th monitor was confidential I wish I was making this up. Heck, the old 2012 Macbook Pro was capable of more.I also hope Apple trains its employees better on Apple-supported options to add additional displays since they all had no clue about eGPUs or Airplay. Best video compressor app for macThe latest Mac update removed this option from the “Energy Saver” settings for some reason, so you’ll need to open Terminal and type in this command: sudo pmset -a gpuswitch 0This tells your computer to set your “Automatic Graphic Switching” to 0 (off), and the “-a” value means to apply it to all situations plugged in, battery, etc. If it helped you, make sure you donate to his project as your donations make things like this possible.If you are noticing your screen flickering, this may be your power management feature trying to switch back and forth between your onboard and eGPU. You can find that here.It isn’t yet available for Mojave, but the dev claims that he is building a new version that will be Mojave compatible.SetGpu now supports Mojave! I just tried it and it worked great. They are lightning-fast and the eGPU only uses one Thunderbolt 3 port.SetGpu, a project started by “mayankk2308” from Atlanta Georgia, can help you automatically modify all of your apps to prefer using your eGPU instead of your onboard graphics. Use A Mini For Video Input Series Of GraphicsIt seems that they are detected when plugged in, but MacOS Big Sur does not yet support it.I’ll do my best to update this post when MacOS Big Sur updates and adds back the eGPU functionality. They are updating this page very frequently now and it is subject to change.The new 2020 M1 Mac Mini has been released and does not yet support eGPUs for multiple displays. No more screen flickering!It appears that macOS Catalina supports a new series of graphics cards – the RX 5700 series.If you’ve already upgraded to Catalina or Big Sur and are looking to add multiple displays with an eGPU, make sure you read the official Apple.com support page (link) to confirm that your card and your enclosure are both compatible with your operating system. I stayed on Mojave after hearing Catalina horror stories from friend who works at Apple.The RX 5700 is a much stronger card, so if you’re on the latest version of Catalina, I’d recommend returning the RX 580 and upgrading to the RX 5700.I’d imagine wiping the computer and downgrading to Mojave isn’t high on your priority list so this seems like the way to go.Let me know your specs though and if this helps you.Hey Khalid, it’s unlikely that it’s the video card… Recommended graphics cards include the AMD Radeon RX 5700, AMD Radeon RX 5700 XT, and AMD Radeon RX 5700 XT 50th Anniversary.”If you’re on the latest version of MacOS, it’s possible that this specific card is no longer supported. Something to consider nevertheless.If this helped you, or if you have questions or comments, please leave me a message below! I do my best to respond to each and every comment.It seems like your chassis and your card are both on the compatibility list which is good.Make sure the Thunderbolt 3 cable is connected directly to your Mac and not a third-party peripheral.I just noticed this little tidbit on Apple’s eGPU page:“If you’ve installed macOS Catalina 10.15.1 or later, you can use these graphics cards that are based on the AMD Navi RDNA architecture. If you’re using your displays for any sort of high-performance graphics or if slight stutters are completely unacceptable, this may not be the best option for you. Update your Mac Mini with caution until Apple figures out this multiple monitor thing.Here’s a user who’s simply using external USB 3.0 video cards to power his monitors on his M1 Mac Mini.I’m not a fan of USB video cards for their performance limitations, but these little USB cards seem pretty mighty for casual use. Are your adapters Apple brand or third party?I’m seeing multiple people on forums that have a TB2 Mac Pro like yours, using Apple’s TB2>TB3 adapter, a Sonnet Breakaway box, and a supported AMD cards.Some of them did it using a script called PurgeWrangler, which you might want to try.Personally, since this is an older TB2 Mac, I’d try using PurgeWrangler. Your displays are all plugged into the eGPU, I’m assuming? I’m assuming you’re on the latest version of Big Sur? How many displays do you have? What is the resolution of those displays?
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