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Apple Computing Products:
macOS - Desktop Hardware
iMac mid 2011 ? Boots in macOS Utilities
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<blockquote data-quote="ProfessorChaos" data-source="post: 1806623" data-attributes="member: 400315"><p>I decided to just add to this thread instead of creating a new one , so this is the update . </p><p></p><p>I finally managed to get the machine to boot from the USB , then I went into Disk Utility and Restored the internal HD , and perform First Aid on the HD. </p><p>it came back good , I wasn't expecting that at all . </p><p></p><p>Then I was able to change the start up disk to the original internal HD and it booted ! </p><p></p><p>To test out the internal HD , I created a simple text document and tried to save it to the HD , it wouldn't let me . I was getting a message that said I did not have permission to perform this task . </p><p>I tried to change the permissions , but nothing I tried worked . </p><p></p><p>I booted back from the USB and the computer would not boot , both drives showed up in Disk Utility , but I got this message from the USB :</p><p></p><p>This disk doesn’t use the GUID Partition Table scheme</p><p></p><p>Use disk utility to change the partition scheme. Select the device containing the disk , click the Erase button , select the Volume Scheme and then click Erase . </p><p></p><p>( I tried doing this but it did not work , also I didn't see anything in the partition tad that mentioned GUID ) </p><p></p><p>I got this message from the Original HD : </p><p></p><p>This HD is locked . </p><p></p><p>I read that I can try to reset the NVRAM to unlock the SIP , Apparently High Sierra had this enabled with the latest update . ( I didn't run into this problem before )</p><p></p><p></p><p>Now when I turn on the computer it only will load half way and then the machine shuts off . </p><p></p><p>I understand that the HD needs to be replaced , I am just curious about all this strange behavior . it is possible the HD started working for a short amount of time and then stopped working again ?</p></blockquote><p></p>
[QUOTE="ProfessorChaos, post: 1806623, member: 400315"] I decided to just add to this thread instead of creating a new one , so this is the update . I finally managed to get the machine to boot from the USB , then I went into Disk Utility and Restored the internal HD , and perform First Aid on the HD. it came back good , I wasn't expecting that at all . Then I was able to change the start up disk to the original internal HD and it booted ! To test out the internal HD , I created a simple text document and tried to save it to the HD , it wouldn't let me . I was getting a message that said I did not have permission to perform this task . I tried to change the permissions , but nothing I tried worked . I booted back from the USB and the computer would not boot , both drives showed up in Disk Utility , but I got this message from the USB : This disk doesn’t use the GUID Partition Table scheme Use disk utility to change the partition scheme. Select the device containing the disk , click the Erase button , select the Volume Scheme and then click Erase . ( I tried doing this but it did not work , also I didn't see anything in the partition tad that mentioned GUID ) I got this message from the Original HD : This HD is locked . I read that I can try to reset the NVRAM to unlock the SIP , Apparently High Sierra had this enabled with the latest update . ( I didn't run into this problem before ) Now when I turn on the computer it only will load half way and then the machine shuts off . I understand that the HD needs to be replaced , I am just curious about all this strange behavior . it is possible the HD started working for a short amount of time and then stopped working again ? [/QUOTE]
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Apple Computing Products:
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iMac mid 2011 ? Boots in macOS Utilities
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