Unable to get it connected with M1 MacBook Pro through adaptor

@danj -- Hello Dan, thanks for this quick response. So, are you saying the thunderbolt port at this Apple display is actually miniDisplay port only, not the actual thunderbolt?

And also, the webcam and speakers from this display are not detected when connecting with my 2014 iMac, is there any solution to this?

Thanks again!

@lovecd - Well… not exactly! Think it like a tunnel which has water, gas and electricity all running down. Here we are talking about one service the display (water) and Web Cam (gas) and the speakers (electricity) are independent of each other and that also includes the display’s TB and USB ports.

So TB connection is the Tunnel as you what the display it needs to connect via DisplayPort (water pipe) so all you can connect is the water service side the other services need to be treated independently externally of this tunnel. This is the limitation of TB/TB2 within the TB3 world as TB/TB2 is very different than TB3 or USB-C connections.

@danj -- so, at this time, I can only get display (images on screen) working through mini-display output signals, right? And by the way, what kind of fix is needed if wanting the TB actually functions as it should? Replace the all-in-one cable or logic board? Any thoughts?

Thanks,

@lovecd - DP is the connection you need to use for the display, I can’t offer you any options as the technology has changed between the different TB connections. Talk to Apple see they can pull a rabbit out of the hat here.

As far as changing all in one cable or logic board not sure I follow your logic Apple never offered an upgraded cable or logic board. You could gut the system only saving the case and the display putting in a different controller board. But why, it wouldn’t change anything here.

I have two of these displays and I love them dearly as they offer what I need with my 2013 Mac Pro. When it dies I’ll need to do the same thing when I jump to a Mac Studio system or replace them with new displays.

@danj -- Hello Dan, it looks like I didn't describe the issue well, sorry about it. Let me rephrase it.

1. The monitor I have is 27" thunderbolt display with ethernet and thunderbolt ports at the back, not cinema display.

2. No image shows up when connecting with my 16" Macbook pro through TB3 to TB2 connector (connector has been tested in good working condition with another TB display I have).

3. Image does show correctly if connecting with my 2014 21.5" iMac desktop, but webcam, speakers and 3 usb ports at the back are not detected at all.

So, I was wondering if this is due to malfunctioning either at all-in-one cable or logic board? Any thoughts?

Thanks,