![]() Strangely, the Displays System Preference DOES show the Spectrum plugged in-it shows up in Displays as an Extended Display that I can rearrange or change the settings to-but there is no picture on the monitor itself (I get the “No Signal” message). I even went out and bought two different 8K HDMI cables (from two different manufacturers). The Spectrum will display a signal from the Mac if I use a DisplayPort to DisplayPort cable, so it’s not a problem with the Mac. None of them will generate a signal from my Mac Pro. Since my Windows PC is using the DisplayPort, that leaves me with the two HDMI ports or the USB-C port. I’m replacing one of the Dell monitors with the Eve Spectrum. ![]() I previously had three Dell 4K monitors running from the Mac Pro without issue using DisplayPort to MiniDisplayPort cables. The monitor itself works fine when connected to an Xbox via HDMI or a Windows PC via DisplayPort, so it doesn’t seem like a hardware issue. Finally received my Spectrum 4K yesterday, and I’m having a lot of issues getting it to work with my Mac Pro desktop running an AMD Radeon RX 580 (8 GB).
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