Since upgrading to High Sierra, I can no longer use a second monitor to work with my Mac?
What do I need to do to use two monitors with my mac now that I've upgraded to High Sierra?
What do I need to do to use two monitors with my mac now that I've upgraded to High Sierra?
Start with an SMC reset and an NVRAM reset
<Reset the System Management Controller (SMC) on your Mac - Apple Support>
Start with an SMC reset and an NVRAM reset
<Reset the System Management Controller (SMC) on your Mac - Apple Support>
I have this same problem (iMac 27" late 2013, OS 10.13.4), and am unable to use a second display via Thunderbolt intermittently--sometimes it works, sometimes it doesn't. I have restarted multiple times/ways, reset SMC and NVRAM multiple times, trashed preferences, changed cables and swapped Thunderbolt ports, nothing will consistently solve the issue.
Since upgrading to High Sierra, I can no longer use a second monitor to work with my Mac?