I am using #include <atomic> in my DriverKit extension c++ file. This compiled correctly with older versions of Xcode, but starting with Xcode 12.5 (and beta 13) the compiler can no longer find some required types. For example: In file included from /Applications/Xcode-12.5.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/atomic:571: In file included from /Applications/Xcode-12.5.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/__threading_support:14: In file included from /Applications/Xcode-12.5.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/chrono:827: /Applications/Xcode-12.5.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/ctime:57:9: error: no member named 'clock_t' in the global namespace; did you mean 'clockid_t'? using ::clock_t; There are various other missing definitions, time_t, tm, clock, difftime, time, asctime, ctime, gmtime, localtime and strtime, none of which I am trying to use. I assume that there was a change in the default include paths, but can't see what it is. Suggestions would be welcome! Thanks!

My NetworkingDriverKit extension is failing on Monterey. The RegisterEthernetInterface() call is returning a result of 0x08e4bd01. This code works correctly on both Catalina and BigSur. Can't find any information on that error code. Or what might have changed for Monterey. Suggestions would be welcome! networkInit_Impl [result = RegisterEthernetInterface(ivars->fHostMAC, ivars->poolPacketBuffer, ivars->queues, 4)] Unkown_kIOReturn 8e4bd01

Is there a correct method for replacing an older version of a DriverKit extension? Specifically, will the Installation application need to be able to detect if the older DEXT is installed and activated and specifically be able to deactivate it before trying to install a new version?

Are there any examples showing USB I/O using DriverKit apis?