iMac Startup Red-green Apple Logo Problem

Question

ifmyelse Author

Level 1

11 points

iMac Startup Red-green Apple Logo Problem

macOs Sierra update after, startup problem. help please.

Startup Problem Video:

https://drive.google.com/file/d/0B404zgUVwxyUWXZoZVNSRGlQd2c/view

Startup Problem Screen Shot

http://i.hizliresim.com/Y48RL2.png

iMac, iOS 10.0.2, problem

Posted on Sep 28, 2016 3:40 PM

Reply

Answer 1

sterling r

Community Specialist

Sep 29, 2016 5:06 PM in response to ifmyelse

Howdy ifmyelse,

It looks like you are getting a graphical anomaly when you start the computer centered around the Apple logo. I would start by resetting your NVRAM, which you normally would reset for graphical issues:

How to Reset NVRAM on your Mac

Thank you for using Apple Support Communities.

Reply

Answer 2

ifmyelse Author

Level 1

11 points

Sep 29, 2016 10:17 PM in response to sterling r

the problem continues. does not experience this problem in safe mode

Reply

Answer 3

sterling r

Community Specialist

Sep 30, 2016 9:41 AM in response to ifmyelse

I appreciate the info and the additional info. Next reset your SMC:

Reset the System Management Controller (SMC) on your Mac

If the issue persists, then we will next have to look into reinstalling the operating system. First make a backup of your computer using Time Machine:

Use Time Machine to back up or restore your Mac

You can find a guide to reinstalling macOS here:

How to reinstall macOS

Let us know if the SMC reset fixes this, or if we can help further.

Reply

Answer 4

ifmyelse Author

Level 1

11 points

Sep 30, 2016 8:14 PM in response to sterling r

the problem continues. i downgrade el capitan. and problem fixed. after update sierra, problem continues... mac os sierra have bug.

Reply

Answer 5

AppleJoe

Community Manager

Sep 30, 2016 8:21 PM in response to ifmyelse

It is very possible that the first installation of macOS Sierra was damaged so, if you're up to it you can try installing Sierra again.

Reply

Answer 6

ifmyelse Author

Level 1

11 points

Sep 30, 2016 8:30 PM in response to AppleJoe

I'm mac OS sierra retry install. the problem is continues. this problem haven't el capitan. why?

Reply

Answer 7

chuck_3rd

Community Specialist

Oct 1, 2016 1:10 PM in response to ifmyelse

Thank you for using the Apple Support Community. Due to the nature of your issue or question you may find more information by using another one of Apple's support resources - https://getsupport.apple.com/GetproductgroupList.action.

Reply

Answer 8

Oct 21, 2016 5:15 PM in response to ifmyelse

I think OS Sierra has a bug because I have this problem too.

Reply