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2 paź 2024 · A blank screen (black, gray, or blue) should appear once or more as your Mac starts up. If your Mac seems to be turning on but is stuck on a blank screen, follow these steps. Turn your Mac off and back on. Press and hold the power button on your Mac for up to 10 seconds, until your Mac turns off. (Every Mac has a power button.
18 mar 2019 · Sometimes when I enable Target Display Mode, the iMac screen stays black, even if my Macbook Pro's display suggests that another monitor has been plugged in (apps move away from the screen). How can I fix this?
8 kwi 2019 · The iMac works fine as a display, but when I try to turn target display mode off (command-F2, or unplugging the cable), the iMac screen goes black or fuzzy, and I can't use the iMac unless I restart it.
2 sie 2018 · The iMac works fine as a display, but when I try to turn target display mode off (command-F2, or unplugging the cable), the iMac screen goes black or fuzzy, and I can't use the iMac unless I restart it.
8 lis 2020 · I'm having a problem with a 5k iMac 27" (mid-2015). When I turn it on, the backlight comes on, but the screen is completely black and there’s no activity. An external monitor (plugged in with a Mini Displayport / Thunderbolt to HDMI cable) works, but only after I log in.
5 kwi 2019 · If you try to enter target display mode while logged into a user account on the iMac, you get a black screen with no other indication that anything else is wrong. The connected Macs think the iMac is a display, but the iMac screen is black.
Change the iMac's brightness *before* activating TDM. I've had this problem intermittently for quite a while now, but reducing my iMac's screen brightness to zero prior to TDM fixed the issue today (had to try twice).
