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Apple Computing Products:
macOS - Desktop Hardware
Mac Pro chime but no boot display
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<blockquote data-quote="harryb2448" data-source="post: 1756854" data-attributes="member: 42497"><p>What ahappened when you bupgraded the operating system, inadvertently or otherwise, the 32bit Boot EFI has been killed this the machine will no longer boot. The correct procedure is to cancel all future upgrades to prevent nthis happening. Here is a link which <strong><em><em><u><u>may</u></u></em></em></strong> get you out of trouble updating the Mac Pro to El Capitan, but be warned it is literally thousands of posts long:-</p><p></p><p></p><p><a href="https://forums.macrumors.com/threads/2006-2007-mac-pro-1-1-2-1-and-os-x-el-capitan.1890435/" target="_blank">https://forums.macrumors.com/threads/2006-2007-mac-pro-1-1-2-1-and-os-x-el-capitan.1890435/</a></p></blockquote><p></p>
[QUOTE="harryb2448, post: 1756854, member: 42497"] What ahappened when you bupgraded the operating system, inadvertently or otherwise, the 32bit Boot EFI has been killed this the machine will no longer boot. The correct procedure is to cancel all future upgrades to prevent nthis happening. Here is a link which [B][I][I][U][U]may[/U][/U][/I][/I][/B] get you out of trouble updating the Mac Pro to El Capitan, but be warned it is literally thousands of posts long:- [url]https://forums.macrumors.com/threads/2006-2007-mac-pro-1-1-2-1-and-os-x-el-capitan.1890435/[/url] [/QUOTE]
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Apple Computing Products:
macOS - Desktop Hardware
Mac Pro chime but no boot display
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