This issue is observed in VIA 126.96.36.199 client running on MacOS 10.8 and MacOS 10.9 versions and was not limited to a specific controller model.
It’s been noted that on VIA 188.8.131.52 client running on MacOS 10.8 and MacOS 10.9 versions, we are unable to install RSA certificates using the user interface since it’s greyed out
Follow these workaround steps to install an RSA certificate:
1. Double-click on the certificate.
2. Add the certificate to the keychain.
3. Add Aruba VPN Agent to the certificate's key's ACL.
Note :- For ease of use a shortcut to VPN agent is placed in user's home directory which is named as ArubaVIA-VPNAgent.