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Apple Computing Products:
macOS - Operating System
IMac 27" 2011 won't boot up after installing new HD
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<blockquote data-quote="Gyrkin" data-source="post: 1807386" data-attributes="member: 401243"><p>Did all that, didn't work. Wouldn't boot up.</p><p></p><p></p><p>Two computers. The broken one belongs to a friend (IMac 27" 2011) and mine (iMac 27-inch, Late 2012) that is working fine. I listed my computer's model becaues I was using it to connect to my firends computer via Target Disk Mode.</p><p></p><p>I tried the solution ferrarr suggested where I have the broken computer connected to mine via target disk mode. I then booted my computer (the one that's not broken) from the flash drive with Sierra install on it. That worked. I installed the operating system on the broken comuter's HD. I also did a Time Maching recovery on it. I even booted my computer from the broken one's HD via a connection using target disk mode. It booted up fine, and all his files and stuff was there. I then tried to boot the broken computer up from this HD and it won't. It shows the Apple logo with the progress bar. When the progress bar gets to the end, the screen goes blank white/grey for a few minutes and then it chimes and tries to restart all over again, and again. If I try to start in safe mode It shows the Apple logo with the progress bar. When the progress bar gets to the end, the screen goes blank white/grey and stays there.</p><p></p><p>I think I have made progress. I have the new HD formatted and a working operating system on it. It works to boot my 27-inch, late 2012 iMac when connected to it via Target Disk Mode.</p><p>I can't get my frinds computer, iMac 27" 2011 to boot from any drive.</p><p>I opened it up and checked all the connections I had to take apart when I installed the new HD and all seem to be tight.</p><p></p><p>Any suggestions on what to try next?</p></blockquote><p></p>
[QUOTE="Gyrkin, post: 1807386, member: 401243"] Did all that, didn't work. Wouldn't boot up. Two computers. The broken one belongs to a friend (IMac 27" 2011) and mine (iMac 27-inch, Late 2012) that is working fine. I listed my computer's model becaues I was using it to connect to my firends computer via Target Disk Mode. I tried the solution ferrarr suggested where I have the broken computer connected to mine via target disk mode. I then booted my computer (the one that's not broken) from the flash drive with Sierra install on it. That worked. I installed the operating system on the broken comuter's HD. I also did a Time Maching recovery on it. I even booted my computer from the broken one's HD via a connection using target disk mode. It booted up fine, and all his files and stuff was there. I then tried to boot the broken computer up from this HD and it won't. It shows the Apple logo with the progress bar. When the progress bar gets to the end, the screen goes blank white/grey for a few minutes and then it chimes and tries to restart all over again, and again. If I try to start in safe mode It shows the Apple logo with the progress bar. When the progress bar gets to the end, the screen goes blank white/grey and stays there. I think I have made progress. I have the new HD formatted and a working operating system on it. It works to boot my 27-inch, late 2012 iMac when connected to it via Target Disk Mode. I can't get my frinds computer, iMac 27" 2011 to boot from any drive. I opened it up and checked all the connections I had to take apart when I installed the new HD and all seem to be tight. Any suggestions on what to try next? [/QUOTE]
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Apple Computing Products:
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IMac 27" 2011 won't boot up after installing new HD
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