For some reason I am missing the iDisk on my iMac. Is there any way to retrieve it. If so how. Also iMac keeps freezing up on me. What to do about that would help. I’m new to Macs.
There are various reasons for both problems...
As for iDisk I would first go click on Finder > Preferences and look into the Sidebar settings. Maybe iDisk was simply deselected and is therefor not visible.
Mulder already stated that iDisk is part of Mobile Me so unless you are using that service the iDisk symbol won't be of much use to you anyway.
As for your Mac freezing this can be duo to a number of reasons. One of the important informations missing is WHEN your Mac is freezing as in what did you do just prior to it? Is it related to some Application or maybe does it happen when you navigate to a specific folder on your Hard Drive?
Other than that basic troubleshooting for Mac OS X is to open up the Disk Utility, select your boot drive and hit the "Repair Permissions" button.
You may also want to run a "Verify Disk" and make sure your file system is not damaged.
Any further troubleshooting requires (way) more information from your end.
.Mac' Preference Pane in System Preferences. iDisk Tab. Turn on iDisk Syncing. Note that this will use 10GB of your drive space
Go to Finder, open its preferences from Finder>Preferences. Look at the labels tab and see if iDisk is checked.
download idisk utilities
iDisk is part of the MobileMe service, so it's not on your computer. You may want to read the details of MobileMe here: https://www.apple.com/mobileme/transition.html
If your iMac is freezing, it could be for any number of different reasons, but since you haven't provided any specific information about the problem, when it started, what you installed just before it started, etc., it's impossible to make any intelligent statement without a lot more detail.
Perhaps you should call AppleCare if your Mac is within 90 days of the purchase date, and if it's beyond that, make an appointment at your nearest Apple Store and take it there so they can try to help you. If there isn't one near you, you can always sign-up for the Apple Support Communities and post your problem there and get help from people all over the world, for free. http://discussions.apple.com