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YashyFlag for United Kingdom of Great Britain and Northern Ireland

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New SSD in 2011 Imac. Question mark with folder keeps showing at startup

Hi guys

My father's 27inch early 2011 imac needed a little upgrade. I went and put in a Crucial 500gb SSD disk into it into where its old hard drive used to be.

When we boot, i am getting the question mark with a folder. I tried holding the Alt option and in doing so only the internet recovery comes up. I tried command R and same thing.

Anyway, so I chose the internet recovery. It took 20mins. Then it came to the menu where I could choose disk utility. I went in and could see the SSD.  I formatted my SSD to Mac format (journaled). I restarted it and still same. Then i tried doing something similar to choose it as the startup disk but I can't. I tried attaching an external disk with Mac Sierra installation on it. It isn't giving me the option of seeing this disk either at startup.

What gives? Is it the Mac itself? Should I take the SSD and install it onto a MacBook Pro and try putting the OS on it that way?

Thanks for helping
Yash
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efrimpol
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For SSD drives, this works, because SSD drives produce so little heat.
Some earlier SSD drives produced more heat than a spinning disk and used more energy than a spinning disk.
serialband brings up a good point about SSD drive heat.

Be sure to only use a recent SSD drives, rather than some drive which is many years old.
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Boys, I did it in the end.

The bootable media was not created properly on the external hard drive. I redid it using disk creator and using a high sierra downloaded into the applications folder of a macbook pro we have. Once done, all was done and perfect. The installation picked up instantly.

As for the fans, managed to install an application called Exirion fan control and put the setting on Smart. And made sure it started up whenever the Mac us turned on by putting it in the startup applications.