Intel iMac question:

When I got my iMac some years ago, I found that one can use half the hard drive to run a Mac OS and by using BootCamp can work with a Windows OS.

Can't operate both at the same time, but can shut down one and do work on the other. I haven't done that, but I have a question about this process. I see nothing about it \online or in books or instructions.

My older Mac OS has features that I will lose if I upgrade. I have the disc for the upgrade, but have not used it. Because I bought an identical disc for another computer and upgraded. After I saw what happened, such as losing a lot of iTunes and Quick Times functions, I refused to upgrade my computer.

In fact, I'm considering setting the other machine back to the older OS. Of course, I was unable to get my current versions of iTunes and Quick Time to interface with the new OS and I hate it. But I'm really getting behind on updates now and want to run both.

Anyone who knows if I can do this, please post.

I will have to call and pay Apple for a Tech call at $30 per problem as this iMac is out of warranty and need to specify what it is I am trying to do. They aren't trained to deal with such questions, they keep trying to get me to buy an upgrade. And therein lies my problem.

TIA.