Or, you could turn FileVault off and have the Dell activate automatically on restart. You could leave FileVault on and open your notebook lid to login when you restart. I've filed a feedback (FB8985087) with this request.įor now, you have a choice to make. So: the real solution is for Apple to ship the Display.Overrides file for the UP2715K as part of a future version of macOS. The System volume is completely sealed and, even with SIP off, changes to the volume won't survive a reboot. path (which is on the System volume and visible to macOS pre-login). As of Big Sur (maybe late Catalina?) I don't believe there is any way of putting the overrides file in the /System/Library/Displays. Therefore, if you have FileVault on, macOS won't be able to activate the overrides file until that first login. The override file we created sits on your Data volume, which (if you have FileVault on) is locked and encrypted until you've logged into your Mac. There's just one thing leftĪfter a reboot the Dell might not activate until you've logged in. and the Dell should be working as expected. You can close your notebook lid, Sleep and Resume, etc. When you login your Dell display should be active at the correct resolution. Close System Preferences and reboot again. This is 5K HiDPI (native retina), and is probably what you want for this display. This will show the full resolution list for the monitor. In the resolution list, click Scaled, and now hold down ⌥ and click Scaled again. This will move the options sheet onto your notebook screen where you can actually see it (assuming your Dell doesn't have an image showing yet). Select that entry and then, again from the Window menu, Move to Built-in Retina Display. If you don't see that exact name, the file we just created didn't get recognized by macOS for some reason. You should see an item named Dell UP2715K (patched). When you've rebooted and logged back in, go to System Preferences > Displays and check the Window menu. He is currently in the process of updating SwitchResX for full M1 support and you should check it out if you want to dig into this further or need better control over your display resolution settings in general. I want to give credit to Stephane Madrau, the developer of the SwitchResX tool that was used for originally creating this file, who helped me understand what was happening and what this patch actually does. Now, create a file DisplayProductID-40b6 (no extension) in this directory with the following contents. Sudo mkdir -p /Library/Displays/Contents/Resources/Overrides/DisplayVendorID-90ac Start by creating the directory tree where the override file will go. This procedure adds an override configuration file that macOS uses to see the correct available resolutions. The problem is that, by default, macOS doesn't recognize the correct list of available resolutions from the UP2715K. He documented his approach and success in the Apple support communities and when I couldn't quite get it to work myself he was generous with his time and configuration files. Here's how to get it working with the M1 Macs.Ī huge shout out to Alex Argo who actually spent the time on the phone with Apple support that led to this solution. Sadly discontinued, the UP2715K is still one of the best/only 5K options that isn't an iMac. The monitor has worked seamlessly with Intel Macs since it was first introduced (assuming you had the right adapter). Getting a Dell UP2715K working with the new M1 Macs is tricky. macOS once again natively supports the UP2715K on M1 Macs. UPDATE After updating to macOS Monterey 12.1 (I skipped 12.0), this fix no longer seems necessary.
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