Welcome to iMovie Discussions ..and to the Mac!
The TRV14E should be perfectly compatible, as long as you've got a fault-free 4-pin-to-6-pin FireWire cable, and the FireWire ports on the laptop and the camera are working properly.
Sometimes the computer and camera need to understand which one's giving, and which one's receiving, the FireWire commands.
Scroll halfway down
this page of Dan's to "Sony camcorder special fixes" and try the "Video Edit" trick to 'kick' the camera and computer into proper communication.
If FireWire ports didn't seem to be communication, Lennart's old trick - though I don't know if this works with MacBook Pro laptops - was to shut down the computer completely, remove power cables (..and on a laptop, I s'pose, remove the battery..) and leave for 15 minutes, Apple says that this should reset the FireWire port(s). (On reconnecting, of course, you'd probably have to reset the Time and Date, as these may have been lost.)
If
that doesn't help, it's just possible that the FW port on the camera may be ill, but then again, if it worked with your Windows laptop, it must be OK.
Try a different FW cable? (..Connection has never worked for me with a 6-pin-to-6-pin cable which has a 4-pin
adaptor on the end. It must be a proper 4-to-6-pin cable..) ..The camera, of course, must be set to 'VCR' mode, not to 'Camera' mode..
Has any of this helped?