It's an environmental shame that “Target Display Mode” is not a thing anymore. : r/mac
How to Use an iMac as an External Monitor
iMac "Core 2 Duo" 2.0 20" (Mid-2009) Specs (Mid-2009 (Edu), MC015LL/A, iMac9,1, A1224, 2266): EveryMac.com
iMac (Early 2009) | Low End Mac
Airplay 2 MacBook, Use an Old MacBook as a wireless display thanks 2 OCLP, Works on any Year MacBook - YouTube
Identify your iMac model - Apple Support
Use your iMac as a display with target display mode - Apple Support
Pardon me but the new display made the old iMac a steal. Despite the speakers, camera, ports and extra 100 nits brightness. You get a fully working Mac for $200 extra, heck... :
How to stream video from your Mac to your TV, with or without Apple TV | iMore
How to Use an iMac as an External Monitor
iMac "Core 2 Duo" 3.06 27" (Late 2009) Specs (Late 2009, MB952LL/A, iMac10,1, A1312, 2309): EveryMac.com
How to use an old iMac as an external display for a MacBook via wifi? - Ask Different
Using a 27-inch 2009 iMac as External Mon… - Apple Community
Apple iMac fall 2009 (Intel Core 2 Duo 3.06Hz review: Apple iMac fall 2009 (Intel Core 2 Duo 3.06Hz - CNET
Using Late 2009 Imac as external display … - Apple Community
iMac Intel 27" (Late 2009 or Mid 2010) Graphics Card Replacement - iFixit Repair Guide
5 Things to Know Before Upgrading Your 2009 or Later iMac
2009 iMac conversion to monitor - Help | MacRumors Forums
Newer Macs Can Use Another Mac as an External Display on macOS Monterey | MacRumors Forums
Mac OS Ventura TARGET DISPLAY MODE IS BACK!! Using an old iMac as a monitor OCLP - YouTube
2009-2011 27" iMac as an external display | MacRumors Forums
Replacing an iMac Hard Drive with an SSD
How to Use AirPlay Mirroring on a Mac with OS X | OSXDaily
iMac "Core 2 Duo" 3.06 21.5" (Late 2009) Specs (Late 2009, MB950LL/A*, iMac10,1, A1311, 2308): EveryMac.com
Identify your iMac model - Apple Support
Replacing an iMac Hard Drive with an SSD
How to Use an iMac as an External Monitor
Running Monterey on a 10 year old iMac. Open core is a life saver. 😭 : r/MacOS
