A:AnswerThis monitor does not have any mounting brackets on the back and can not be installed on a mount. You will need to look for a monitor that has VESA mounting brackets on the back.
A:AnswerYes, you will need an adapter. Most likely something like Thunderbolt to HDMI. Here is a link to more information: https://support.apple.com/en-us/HT202351
A:AnswerTo be able to use this HP 22er monitor with your MacBook Pro, you will need an adapter to the HDMI port on the monitor. This website will help find the right adapter for your MacBook Pro: https://support.apple.com/en-us/HT201736