Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Question:

Question: External Monitor "desktop" issue

I have an iMac - Retina 5K, 27-inch, Late 2015 running High Sierra.


I use an external monitor for an extended desktop. (It's an HP model that I turn sideways so it is in the "tall" position)


Sometime about 6 to 12 months ago the "desktop" of the external monitor would always become unresponsive when waking up from an extended sleep period (anything more than a few minutes). Desktop icons disappear and the desktop is unresponsive to everything. And app window on that monitor still works fine.


Unplugging and reconnecting the connection cable will bring the desktop back to life.


I've tried thunderbolt to HDMI, and thunderbolt to SVGA (?) cables. Same results.


Two MacOS updates ago this problem was fixed! My external monitor worked flawlessly for about 2 to 4 weeks... then the latest update (10.13.3) broke it again.


I've tried repairing permissions (using TechTool pro) and many other system cache cleaners and such...


Any ideas? Anyone else have this problem?


Randy

iMac with Retina 5K display, macOS High Sierra (10.13.2), Various iGadgets and Macs, updated

Posted on

Reply
Question marked as Solved
Answer:
Answer:

You've tried a different Mini DisplayPort-Thunderbolt to HDMI adapter and HDMI cables?


Hookup what you have and reset the NVRAM.

see > How to reset NVRAM on your Mac - Apple Support


If that does not help, test some different adapters, cables and another monitor to see if it works better.

Posted on

Page content loaded

Question marked as Solved

Mar 11, 2018 6:32 PM in response to Randy Maynard1 In response to Randy Maynard1

You've tried a different Mini DisplayPort-Thunderbolt to HDMI adapter and HDMI cables?


Hookup what you have and reset the NVRAM.

see > How to reset NVRAM on your Mac - Apple Support


If that does not help, test some different adapters, cables and another monitor to see if it works better.

Mar 11, 2018 6:32 PM

Reply Helpful

Mar 12, 2018 5:36 PM in response to Randy Maynard1 In response to Randy Maynard1

Den.Thed,


I've tried two different cables so far (one that coverts to HDMI and one that converts to SVGA) with the same results. I did the NVRAM things last night... and so far so good! I am thinking that did the trick. Thanks!

Mar 12, 2018 5:36 PM

Reply Helpful
User profile for user: Randy Maynard1

Question: External Monitor "desktop" issue