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I have an old iMac (21.5-inch, Late 2012) and i want to use it as a second monitor for my new MacBook Air (M1, 2020).

Is it possible without latency or any quality loss?

If it is, what are the options of doing it, and did any one test it and can confirm some method that really works?

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    Have you tried to simply connect the monitor to the device? The only real requirement is that the MacBook Air (M1) has a video output port that the monitor also supports.
    – Ramhound
    Commented Jan 21, 2021 at 22:20
  • The macbook air has only a usb-c port.
    – Ben
    Commented Jan 21, 2021 at 22:26
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    So unless the monitor also supports video over USB Type-C you won't be able to connect the monitor to that device.
    – Ramhound
    Commented Jan 21, 2021 at 22:31
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    The iMac would do it, but the 2020 MBA won't. See apple.stackexchange.com/questions/389348/… for the full story.
    – Tetsujin
    Commented Jan 22, 2021 at 8:06
  • Thanks @Tetsujin ! any hacks to solve this?
    – Ben
    Commented Jan 24, 2021 at 0:49

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