How Do I Use an iMac 2010 (Yosemite) As External Monitor for MacBook Pro (2022)?

Question

I have a MacbookPro from 2022 with Ventura and I would like to use my iMac from spring 2010 (Yosemite) as an external monitor for my MacbookPro. Is this possible and if yes what do I have to do to make this work? I tried connecting the two computers with a cable (Miniport for the iMac and HDMI for the MacbookPro) and then pressing &#8220;Alt F2&#8221; on the iMac but this did not work.  I do not use the iMac as a computer anymore but I would like to use it as an external monitor as the monitor is still very good. &#8212;&#8211; Antje Koch

Accepted Answer

You can&#8217;t. It isn&#8217;t possible. Your Mac must be a 2019 model or earlier with macOS Catalina or earlier installed. This won&#8217;t work with any 2020 models or later, or even 2019 models or earlier unless you are willing to downgrade to Catalina, which is not a good trade-off. Even if it were, a 2010 screen is very much inferior to what is available today. You can get a 4K screen for less than $300. More pixels, better brightness and contrast, lighter, more input options. And it is probably much more energy efficient too. I think you are thinking of the &#8220;Target Display Mode.&#8221; But that is only available if you have the right older iMac and you are using an older version of macOS. But even then, still not a good screen to use in 2023. https://support.apple.com/en-us/HT204592

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