I want to place some photos on eBay, but I can't as the photos are too big. How can I reduce their size? Must I buy an expensive program like Photoshop?

Also, I have an install CD but my iMac (OSX 10.1.2) tells me I can't install it because it does not appear to be compressed or encoded. What must I do to install this?

TIA
Alf.

I highly recommend this FREE program called XnView. You can get it here: http://perso.orange.fr/pierre.g/xnview/enxnview.html

Go to

Mac, Palm, and Windows Software Updates and Downloads - VersionTracker

And search for graphic converter. Must have mac app

Do you have iPhoto? If you do you can add the photos to an album, and then choose the ones you want and click on email. It will ask you what size you want. Email it to yourself and then save the attachments to your desktop, and upload them from there.