Which App are you referring to, if you intend to use iMovie here is a useful link for you:
to determine which cameras are currently supported.
Thank you, I have seen that link, which indicates compatability. Not sure what you mean by App - she will use iMovie on the iMac. However, the man in the shop had checked with the Sony rep, who says that the video cannot be transferred via the storage card, but must be via HDMI. I have seen a few problems about Sony camcorders here, but no mention of this issue.
If that is a Sony HDR-CX190 then the answer is yes.
It has a USB interface as well as a mini-HDMI port. If you choose to use HDMI you should buy this adapter:
If you want to spend an additional $30 for a lower quality equivalent you can get the same thing from Apple
That camera will work, but I recommend against buying anything that does not overtly indicate OS X support. That one does not. If a company chooses to ignore this segment of the market that's their problem. Don't make it yours.
Some people are partial to Sony; I prefer Panasonic products.
... Why is it in the Apple compatable list?
Because it is compatible with iMovie, and will work. It's just that if you should ever have occasion to call Sony they may not be able to spell "Mac" even if you give them the first and last letters.
Here is one sample review for you to consider (not your proposed model, but consider the writer's general concern).
I use Panasonic - you will find many models comparable to that one.
Here is one - there are many others: http://shop.panasonic.com/shop/model/HC-V100MK?t=overview
^^ that's what I want to see.