Late 2012 iMac detects BenQ monitor only briefly in the Displays Setting
To Whom It May Concern:
I connected a 32" BenQ 4K monitor (PD3225U) to my late 2012 iMac via Thunderbolt Cable with a Thunderbolt to Thunderbolt 2 adapter. My iMac will detect the BenQ monitor briefly, about 5 seconds under the Displays Setting and then disappear. During the whole 5 seconds, the BenQ monitor remains dark but active (not sleeping). I used the same Thunderbolt cable via a VGA adapter to connect an old 19" Viewsonic SXGA monitor before for many years without problems.
To troubleshoot, I connected the BenQ monitor to my girlfriend's MacBook Pro with a M1 chip and it worked normally. I tried to look for a driver to download at the Benq website but there are no drivers for Mac, I guess no drivers are needed. I tried to update the firmware in the BenQ monitor but since my iMac can only detects it for 5 seconds, couldn't update the firmware. Thank you very much!
iMac 21.5″, macOS 12.7
