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Identiv's SCR3310v2.0 is a small and ergonomic USB smart card reader with backside mounting holes. There is an active Citrix support thread on the “no valid certificates found” issue. Note: This entire post is basically google search bait designed to (hopefully) allow others struggling with the same issues to save a bit of time. Using PIV smart cards for HHS VPN login with Mac OS X 10.10 Yosemite. If you see card info with a card inserted, then the card is recognized but no being mounted, and most likely you've got a software problem. Otherwise, it's a hardware or Firmware issue. Outlook for mac version 16.20 compatible with high sierra 10.13.6. If the card reader is recognized, you should see at least a Vendor ID, Serial Number, etc. Try this with both a card inserted and no card inserted.
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Because of this issue, the following problems might occur in Horizon Client on macOS 10.13 or later. The Keychain Access app does not refresh when you unplug and re-plug in a smart card/smart card reader, and the Mac client cannot obtain the update status for the smart card. Support for macOS High Sierra (10.13), macOS Mojave (10.14).
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