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Question: 2009 imac won't startup. Latest OS. We don't have startup discs anymore. White screen with apple keeps loading for hours and hours.

Yes.

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Question marked as Apple Recommended
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Answer:

Try an SMC reset:

How to reset the System Management Controller (SMC) on your Mac - Apple Support

Try starting up in Safe Mode:

Use safe mode to isolate issues with your Mac - Apple Support

If that doesn't work try booting into Recovery Mode and reinstall Mac OS:

About macOS Recovery - Apple Support

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Question marked as Apple Recommended

Mar 17, 2018 5:52 AM in response to MacFunky In response to MacFunky

Try an SMC reset:

How to reset the System Management Controller (SMC) on your Mac - Apple Support

Try starting up in Safe Mode:

Use safe mode to isolate issues with your Mac - Apple Support

If that doesn't work try booting into Recovery Mode and reinstall Mac OS:

About macOS Recovery - Apple Support

Mar 17, 2018 5:52 AM

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Question: 2009 imac won't startup. Latest OS. We don't have startup discs anymore. White screen with apple keeps loading for hours and hours.