Can't read interface strings on macOS without opening device

[cstrahan]

Hello!

It seems there's something detail about how Orbtrace implements USB that results in the interface strings not being recognized/cached on macOS.

That is, the interface strings are available when the device is opened, but not when going through the IO-less code path that nusb has recently implemented (which uses IORegistryEntrySearchCFProperty), which probe-rs is now making use of, which now leads to my issue posted there (some details there might be of interest):

• Can no longer detect Orbtrace probe on macOS probe-rs/probe-rs#2122

For comparison, my MCU-LINK is detected just fine. Given that, it would seem that there's probably some quirk in Orbtrace's handling of USB that could be resolved, allowing probe-rs to discover it again.

If there's any other info you'd like me to provide, I'd be more than happy to.

[cstrahan]

Sorry for the noise; I tracked this down to a bug in nusb. kevinmehall/nusb#37