Is there a way to transfer the cassettes to my iPad Air so I can edit on iMovie?
Sony.Who manufactured it?
If your Sony camera has an iLink port, it's Firewire and your iMac likely had that as well (depends on how old your iMac is). Do you still have an older Mac around with a Firewire port? That would be the easiest way to transfer your videos. They'll mostly likely be .MOV uncompressed files, and will be quite big but iMovie should have no problem recognizing them.Sony.
when I had an iMac, I had no problem hooking the camera up to it.