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MacBook Pro 16’’ to iMac late 2009 27’’

Hi:

have an old iMac 27 inch late 2009 at present running macOS Sierra with a mini display port at the back that supports output and input from external display port sources. Can I using this large screen as a 2nd display for my MacBook currently using macOS Sonoma through a USB C to mini display port cable?

MacBook Pro 16″, macOS 14.0

Posted on Oct 17, 2023 6:35 AM

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Question marked as Top-ranking reply

Posted on Oct 17, 2023 9:50 AM

Unfortunately, that setup is not supported by Apple. The iMac cannot be used as a monitor for any of the newest Macs and Target Display mode is no longer a feature of macOS, having been deprecated several years ago.

Please see: Use your iMac as a display with target display mode - Apple Support


Per the link above:

• Your target iMac (monitor) must be using macOS High Sierra 10.13.6 or earlier. 

• In all cases the source Mac that you're connecting FROM must have been introduced in 2019 or earlier and have macOS 10.15 Catalina or earlier installed.


You might consider a third-party solution, for example: Luna Display or Duet Display, though I can’t speak for the performance of those.


Do yourself a favor, avoid the headache and just budget an extra $100 for a monitor. Yes, they are that inexpensive.


1 reply
Question marked as Top-ranking reply

Oct 17, 2023 9:50 AM in response to Dr Rajan

Unfortunately, that setup is not supported by Apple. The iMac cannot be used as a monitor for any of the newest Macs and Target Display mode is no longer a feature of macOS, having been deprecated several years ago.

Please see: Use your iMac as a display with target display mode - Apple Support


Per the link above:

• Your target iMac (monitor) must be using macOS High Sierra 10.13.6 or earlier. 

• In all cases the source Mac that you're connecting FROM must have been introduced in 2019 or earlier and have macOS 10.15 Catalina or earlier installed.


You might consider a third-party solution, for example: Luna Display or Duet Display, though I can’t speak for the performance of those.


Do yourself a favor, avoid the headache and just budget an extra $100 for a monitor. Yes, they are that inexpensive.


MacBook Pro 16’’ to iMac late 2009 27’’

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