![What is the name of this port? I am trying to use my late 2009 27” iMac as a secondary monitor for my 2020 MacBook Air : r/mac What is the name of this port? I am trying to use my late 2009 27” iMac as a secondary monitor for my 2020 MacBook Air : r/mac](https://preview.redd.it/8yhaexhe6p971.jpg?auto=webp&s=882a62ce431883f15c4e80e80aa6853213006f96)
What is the name of this port? I am trying to use my late 2009 27” iMac as a secondary monitor for my 2020 MacBook Air : r/mac
Apple iMac 21.5in (Late 2009) Review: Apple beefs up its consumer desktop PC with a faster CPU and an energy-efficient display - Back to School - Desktop PCs - PC World Australia
![iMac 20-Inch "Core 2 Duo" 2.0 (Mid-2009) Specs (Mid-2009 (Edu), MC015LL/A, iMac9,1, A1224, 2266): EveryMac.com iMac 20-Inch "Core 2 Duo" 2.0 (Mid-2009) Specs (Mid-2009 (Edu), MC015LL/A, iMac9,1, A1224, 2266): EveryMac.com](https://everymac.com/images/cpu_pictures/apple_imac_intel_2009.jpg)