Not an "expert", but a happy user of this product:
a) I successfully connect the device to my Macbook Air (M3, 2024) using one of the two Thunderbolt / USB 4 ports.
I also use the device as secondary monitor with (Lenovo-) Windows (W10, W11) notebooks.
b) The device gets powered over USB and does NOT need any additional power source. These devices are extremely easy to setup and use.

Two additional pieces of advice:
- Make sure to protect it properly when computing with a backpack otherwise you might also end up having some "backlight bleeding". The sleeve out of the box is rather limited for more demanding commuters.
- Note that the device supports a resolution of 1920x1080 while Macs typically support a far better resolution. For most regular business purposes not an issue, but if you are into heavy video and/or image editing you might reconsider alternatives.