iOS apps running on Apple Silicon will detect your Mac as an iPad Pro 12.9 3rd gen. I haven’t used parallels but I’ve been able to get Firefox in OS X to work with a cac reader and webmail.

If you have access to the developer tools and want to poke around at a lower-level than usual, there's a USB Prober tool that's part of the Xcode hardware tools package. While Parallels says they can handle CAC/smart card readers. CAC READER FOR MACBOOK PRO CAC READER FOR MACBOOK MAC OS X Universal Compatibilit圜hip Card Reader works with virtually all contact chip cards and PC operating systems, including Windows (32/64bit) XP/Vista/7/8/10, Mac OS X and Android OS. On no evidence, I'd also try a safe boot, try the USB Card Reader, and then shut down see if the behavior with this device changes,Īlso try the SMC reset, as that can reset the state of the device.Īlso see if other USB devices work and see if other USB ports work, as it's conceivable you've lost the USB port(s) on the iMac. One of those could conceivably be getting tangled with or confused by these USB devices. If you have any add-on tools that chat to devices on the USB, such as USB serial dongles, see if that software is current, and also look at removing it. USB devices can fail, or can draw too much power, and one wonky device can drag down the whole USB bus. Shot-gun answer follows, and all this presuming that you've verified the sidebar stuff discussed earlier.ĭisconnect all external devices - hubs, disks, whatever - except the card reader, and try hot-plugging it again.

Macbook cac reader