Will Logitech webcam c310 HD work on a mac with mountain lion ?

Only certian Logitech Webcams support OS X. So before you buy one, check out either the on-line Spec's or the box to make sure that it is OS X compatible.

Looks like the > Logitech - HD Webcam C310 only supports Windows.

The > Logitech- - HD Webcam C615 and others do support OS X.

For more see > Amazon.com: Mac Compatible Webcams

Yes, it works fine. I know Logitech doesn't say it's compatible with OSX but you just need to plug it and it will be recognized by the system and you can use it with Photobooth, FaceTime, iChat, Skype, etc.

I can confirm it works fine. Being a Windows user, I waited for a popup after I plugged it in to say it found the hardware, or a setting to show it had drivers. But all you need to do is go to the program you use for video (like Hangouts), and switch the dropdown from Facetime HD camera to Logitech. It just works.