Please be more specific. But try this. When starting the computer, hold down the D key. It will force it to start up on your internal drives OS X volume. Once the finder has loaded, open system preferences > startup disk > OS X (the one on your internal hard drive it should be the first one in the list. Choose restart. You shouldn't have any problems after this.
On an iMac you can go to the System Preferences under the Apple Menu, then go to NETWORK. Choose which device connects you to the internet, wether it be wireless or wired, then click ADVANCED. From there your 'DNS' tab is clickable and will give you the specified information.
It runs on the OSx operating system. It would not be an iMac if it ran on Windows or any other system.
The G5 came with the OS 9 operating system and had a Power PC processor. It was the last edition of Mac OS. The iMac switched to the OSx operating system with the next iMac. There was an education only model G5 that did ship with OSx Panther.
Intel microprocessor-based computer running the Apple Macintosh operating system; Intel-Macintosh computer; IMac computer; iMac computer
The first iMac was produced in 1998.
By pressing the power button on the back
The iMac comes in two different screen sizes. Customers can choose from the smaller 21.5 inch screen or the larger 27 inch screen. Both options are available ion their website.
Turn it on by pushing the power button on the back left bottom of the iMac.
NO!
System Preferences, Accounts, check the "Allow user to administer this computer" box.You may have to unlock the settings with your login password in order to make changes.
The term iMac refers to the design of the computer. The latest operating system for the iMac was released in September of this year 2012. It is called Mountain Lion. It is OSx version 10.8.1.
It depends on your operating system.