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I've spent many hours trying to get my 2012 iMac to function as secondary display for 2020+ macbook(s). It worked perfectly well with 2019- macbook(s). The iMac
by mrgzg1 5y ago
I've spent many hours trying to get my 2012 iMac to function as secondary display for 2020+ macbook(s). It worked perfectly well with 2019- macbook(s). The iMac is perfectly functional and has capability to be used as a "Target Display". Screw the folks who advocate dropping features like this so that I can generate more waste & buy newer crap from them.
- watersb 5y agoThe utter frustration is real. One reason that Target Display Mode has faded away could be a real, tech hardware issue: retimers required to drive the High-DPI displays on recent Macs. It's not a satisfying thread of speculation. And it's not even wrong: all 2020+ Macs support Thunderbolt, the whole point of which is to drive DisplayPort and PCIe over the wire... How hard could it be, to get a Mac to just run as a ThunderBolt screen? So the next thing I considered was Thunderbolt, DMA, PCIe, and security. The new Mac hardware has tried very hard to protect the machine from data exfiltration. You can fall through the rabbit hole at the great Eclectic Light blog, but anyhow it can seem needlessly complex, and yet full hardware encryption while supporting system updates out in the world is challenging. I've been unable to brick my MacBook, so far, so that's an improvement. I am dropping off my 27-inch iMac for recycling next week. It's not a retina model, and I did use it as a target display, but mounting hardware age (I replaced the motherboard etc myself) have rendered it to be too much work to deal with. It's 12 years old, that's almost good enough for me.