I'm not an iMac user but if you have itunes.... it should ask you if you want to transfer your data.... it should back-up all your photos so I think you won't lose the photos (im not really sure).... as for the other data on the ipod (wheather it's music, videos, movies)..... it should ask if you want to transfer it to your itunes..... unless your itunes account is already active on your iMac then you should have no worries about losing other data.....
Syncing photos from a device into iPhoto, or your PC only works using an actual camera, or via upload of your photo stream from your iPhone or iPad. The iPod is not a camera and does not contain a camera, so all photos on it are simply stored there from a previous download via a computer.
Also, photos are not stored in the iTunes library. They are stored in iPhoto, Apeture, or in My Photos on a PC.
The software products listed on the link are the only way to move pictures from an iPod to the PC or Mac.
There are a number programs out there for recovering photos from an iPod, have a look at the ones below. If you search the internet you can find more. Just be aware that what you'll be recovering will be photos optimised for the iPod so they won't be the same quality as the original full resolution versions:
iPodPhotoCopy Windows only
CopyPodPhoto Windows only
Tansee iPod Transfer Photo Windows only
iPod Photo Liberator Mac & Windows
TouchCopy Mac and Windows Versions (iPhone and iPod Touch compatible)
If you have full resolution copies of the photos on the iPod have a look here: Apple Knowledge Base article - Use Disk Mode to copy photos from iPod
@ Reneoper, he's got full resolution photos on his iPod.
His computer is an iMac without Windows.
I clicked the last link about Disk mode but was taken to the Apple page.
Is there a link about using Disk Mode? That might be what he needs to use.
Thanks for the information. I appreciate it and will send this page to my friend.
PS..Let me add: He isn't using an iPod Touch. See the photos above. It looks like a Nano to me?
Message was edited by: rockeeeeeee