I would not treat this as gospel but from a quick Google search it seems the following applies.
WPA WiFi networks used TKIP encryption
WPA2 Personal WiFi networks use AES encryption
networks running in a hybrid WPA/WPA2 Personal configuration use TKIP
FIPS mode is apparently merely the enforcement of using AES encryption.
Therefore if your WiFi network is configured to WPA2 Personal and not WPA or the hybrid mode then you should be using AES encryption and hence equivalent to FIPS mode.
Macs can connect to WPA and WPA2 Personal and hybrid networks. They don't however have an explicit option for FIPS mode since they merely use WPA2 Personal for the same (apparent) configuration.
If you (successfully) connect to a WiFi network and then hold down the Option key on the Mac keyboard and click on the WiFi menu icon it will drop down a menu and list a lot of normally hidden information. One entry is the 'security' mode so WPA = TKIP, WPA2 Personal = AES.