iMac start up but stuck at progressing bar stage

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Level 1

5 points

iMac start up but stuck at progressing bar stage

Out of the blue, my iMac 27'(late 2013) starts up but the progressing bar only gets filled up about one third and stops there with the spinning circle......... and it gets into the screen-on screen-off loop.

Please help. Thank you.

Jimmy

iMac, OS X Mountain Lion (10.8.3), OS: EL CAPITAN

Posted on Sep 21, 2016 10:37 PM

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Answer 1

Kappy

Level 10

362,017 points

Sep 21, 2016 10:48 PM in response to jimmytbf

Fix Non-Working El Capitan Installation

Try each of these in order. Test to see if the computer is working properly:

Reset the PRAM
Reset the System Management Controller (SMC)
Start the computer in Safe Mode, then restart normally. This is slower than a standard startup.
Repair the disk by booting the from the Recovery HD. Immediately after the chime hold down the Command and R keys until the Utility Menu appears. Choose Disk Utility and click on the Continue button. Select the indented (usually, Macintosh HD) volumeentry from the the side list. Click on the First Aid button in the toolbar. Wait for the Done button to appear. Quit Disk Utility and returnto the Utility Menu. Restart the computer from the Apple Menu.
Download and Install OS X El Capitan 10.11.6 Combo Update.
Reinstall OS X by booting from the Recovery HD using the Command and R keys. When the Utility Menu appears select Reinstall OS X then click on the Continue button.

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