Comment by MBCook
2 years ago
Apple tends to be very picky about spec compliance in some things.
I wonder: is your Mac an Intel model or an Apple Silicon model? Perhaps the Intel powered ports are more lenient?
It would be interesting to know of a high quality cable tester showed some other difference in capabilities between the cables that may explain it.
Both my current M1 Mac and my previous Intel Mac were fine with the cable!
> It would be interesting to know of a high quality cable tester showed some other difference in capabilities between the cables that may explain it.
I'm fairly certain that the cable itself is perfectly fine, but that the iPhone insists on a specific bit being set on the e-marker chip insider the cable, while Macs are more tolerant and will just attempt a USB 3 connection anyway, especially since they need to support unmarked USB 3 for use with USB-A adapters anyway.
You mean malicious on purpose so people buy Apple branded ones when something that should work doesn't