Mac OS 7.4 forticlient Unable to connect via IPSec Client VPN

Hi,

We have Replace firewall 80F to 70G.

Afterwards Mac OS based forticlient (7.4.3) unable to connect via IPSec Client VPN.

FortiGate 70G firmware: 7.4.11

Windows based forticlient (7.4.0) able to connect via IPsec Client VPN.

Error on MAC OS: “connection terminated abruptly .

We have logged case in TAC,After remote session they are not getting any root cause analysis

 Finally, concluded that we have to post this on forums to get any break-fix. As We are using Standalone Version of FortiClient Support is not available for this scenario.