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Apple Computing Products:
macOS - Desktop Hardware
Imac displays shows stripes at boot
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<blockquote data-quote="TattooedMac" data-source="post: 1651087" data-attributes="member: 101749"><p>Boot into Safe Mode using these instructions for Yosemite and see if there is a difference.</p><p></p><p>After your Mac shuts down, wait 10 seconds, then press the power button.</p><p></p><p>Immediately after you hear the startup tone, hold down the Shift key.</p><p></p><p>You should press the Shift key as soon as possible after you hear the startup tone, but not before.</p><p></p><p>Release the Shift key when you see the gray Apple logo and progress indicator.</p><p></p><p>To leave safe mode, restart your Mac again, but don’t hold down any keys during startup.</p></blockquote><p></p>
[QUOTE="TattooedMac, post: 1651087, member: 101749"] Boot into Safe Mode using these instructions for Yosemite and see if there is a difference. After your Mac shuts down, wait 10 seconds, then press the power button. Immediately after you hear the startup tone, hold down the Shift key. You should press the Shift key as soon as possible after you hear the startup tone, but not before. Release the Shift key when you see the gray Apple logo and progress indicator. To leave safe mode, restart your Mac again, but don’t hold down any keys during startup. [/QUOTE]
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Apple Computing Products:
macOS - Desktop Hardware
Imac displays shows stripes at boot
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