SCR-3500A reader needs a manual driver on Mac
macos
Symptoms
SCR-3500A is recognized but does not work.
Likely cause
Default macOS driver does not handle this model; Gatekeeper blocks the installer.
Fix
1. Download scmccid_mac_5.0.41.zip (or newer 5.0.39) from militarycac.com.
2. Hold Control and click the .pkg > Open > confirm the security warning.
3. Follow the installer.
4. Restart the Mac.
Sourced from militarycac.com. Rewritten for clarity.
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