Chosen Solution

My iMac is not opening. When I turn on power button then it seems the computer will open as normal. But taking long time showing the apple logo and the bar below logo but it is not opening. How can I open it?

Try holding down the Shift key on start up to boot into Safe Mode. Next boot holding down the Option key and select the repair partition if you can and run Disk Utilities on it. Let us know your findings.