macOS Big Sur - No clamshell mode...

shandy · 03-22-2021, 01:47 PM

I'm already using an Asus USB-C monitor (which has built-in displaylink) via the 1.3 driver on Big Sur. It's connected to a CalDigit TB3 dock, which is connected to an Intel Macbook Pro in clamshell mode.

I'd like to buy another external monitor - but this time in 4K, which I'll run in HiDPI mode (i.e. 1080p). I'd pair it with a Startech USB3 displaylink adapter capable of 4k@60hz

I'm confused as to what to expect. The 1.3 drivers say clamshell isn't supported, but I'm already successfully using 1.3 with my Asus monitor in clamshell mode.

I saw the comment above about using the CalDigit dock. Does this mean the CalDigit is effectively a get-out-of-jail card for the 1.3 clamshell limitation? I.e. if I plug the Startech adapter into the Caldigit with a new 4k monitor, then it'll work?

03-22-2021, 01:47 PM	#17
shandy Junior Member Join Date: Jan 2014 Posts: 3	I'm already using an Asus USB-C monitor (which has built-in displaylink) via the 1.3 driver on Big Sur. It's connected to a CalDigit TB3 dock, which is connected to an Intel Macbook Pro in clamshell mode. I'd like to buy another external monitor - but this time in 4K, which I'll run in HiDPI mode (i.e. 1080p). I'd pair it with a Startech USB3 displaylink adapter capable of 4k@60hz I'm confused as to what to expect. The 1.3 drivers say clamshell isn't supported, but I'm already successfully using 1.3 with my Asus monitor in clamshell mode. I saw the comment above about using the CalDigit dock. Does this mean the CalDigit is effectively a get-out-of-jail card for the 1.3 clamshell limitation? I.e. if I plug the Startech adapter into the Caldigit with a new 4k monitor, then it'll work?