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Apple Computing Products:
macOS - Operating System
Imac 10.11 no boot
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<blockquote data-quote="Rod" data-source="post: 1939817" data-attributes="member: 204485"><p>The 403 (Forbidden) error is usually related to "permissions" that is you do not have permission to access the files you require.</p><p></p><p>You say you were given this old iMac so my guess is the previous owner did not follow the instructions for "What to do before giving away or selling an old Mac". These entail signing out of various Apple services, iCloud, App Store, iMessage ect then Erasing the device leaving it a condition where the next user sets up an Apple account, email, ect, just like a new computer. Without doing this some of the existing data may only have access permissions for the previous owner.</p><p></p><p>So, yes, you will probably need to completely Erase the device at the Media level, Reformat and Map it before installing a fresh version of macOS El Capitan.</p><p></p><p>To do this you need to download a fresh version of the Installer for the macOS of your choosing from the Apple App Store then use either Terminal or a 3rd party Startup Disk Creator to make a <strong>bootable</strong> macOS Installer on a USB stick.</p><p></p><p>Alternatively as I think you only have the one Mac computer you could purchase a USB (Thumb drive) macOS El Capitan <strong>bootable</strong> installer on Amazon or similar.</p></blockquote><p></p>
[QUOTE="Rod, post: 1939817, member: 204485"] The 403 (Forbidden) error is usually related to "permissions" that is you do not have permission to access the files you require. You say you were given this old iMac so my guess is the previous owner did not follow the instructions for "What to do before giving away or selling an old Mac". These entail signing out of various Apple services, iCloud, App Store, iMessage ect then Erasing the device leaving it a condition where the next user sets up an Apple account, email, ect, just like a new computer. Without doing this some of the existing data may only have access permissions for the previous owner. So, yes, you will probably need to completely Erase the device at the Media level, Reformat and Map it before installing a fresh version of macOS El Capitan. To do this you need to download a fresh version of the Installer for the macOS of your choosing from the Apple App Store then use either Terminal or a 3rd party Startup Disk Creator to make a [B]bootable[/B] macOS Installer on a USB stick. Alternatively as I think you only have the one Mac computer you could purchase a USB (Thumb drive) macOS El Capitan [B]bootable[/B] installer on Amazon or similar. [/QUOTE]
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Apple Computing Products:
macOS - Operating System
Imac 10.11 no boot
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