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Apple Computing Products:
macOS - Desktop Hardware
iMac A1225 and A1224 - Startup Manager Issue
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<blockquote data-quote="ferrarr" data-source="post: 1727667" data-attributes="member: 376394"><p>The problem may be how you put El Capitan onto the USB. Did you create a "bootable installer"? <a href="https://support.apple.com/en-us/HT201372" target="_blank">https://support.apple.com/en-us/HT201372</a></p><p></p><p>Is/was there an OS X version on these machines when you acquired them? </p><p></p><p>It sounds like the USB is not bootable, if the Mac is not seeing it. Have you tried Recovery? <a href="https://support.apple.com/en-us/HT201314" target="_blank">https://support.apple.com/en-us/HT201314</a></p></blockquote><p></p>
[QUOTE="ferrarr, post: 1727667, member: 376394"] The problem may be how you put El Capitan onto the USB. Did you create a "bootable installer"? [url]https://support.apple.com/en-us/HT201372[/url] Is/was there an OS X version on these machines when you acquired them? It sounds like the USB is not bootable, if the Mac is not seeing it. Have you tried Recovery? [url]https://support.apple.com/en-us/HT201314[/url] [/QUOTE]
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Apple Computing Products:
macOS - Desktop Hardware
iMac A1225 and A1224 - Startup Manager Issue
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