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Apple Computing Products:
macOS - Desktop Hardware
iMac Suddenly Slow Performance - Please Help?
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<blockquote data-quote="Lifeisabeach" data-source="post: 1455415" data-attributes="member: 38864"><p>I agree that the hard drive is sounding like the culprit here. CHSCAG beat me to it, but I can only re-iterate what he said... the fan running constantly will only lead to the bearings wearing out prematurely, which will then lead to the hard drive overheating and failing.</p><p></p><p>As an alternative to SMC control, you can always have that thermal sensor cable replaced. I almost did so myself when I replaced my HDD in my 2010 iMac (I really didn't want to stick with Seagate either), but decided I didn't want to mess with that also (and I did stick with Seagate... I hope that doesn't come back to haunt me!). Here's the link to the correct item:</p><p><a href="http://www.powerbookmedic.com/iMac-27-Hard-Drive-Temperature-Sensor-p-21364.html" target="_blank">iMac 27" Hard Drive Temperature Sensor</a></p><p></p><p>Now then, you really need to test your hard drive out. See this post of mine (linked below) for details. The standard SMART test that is often recommended and performed by Onyx is a good start, but everything I've read suggests it will only show pending failure for drives that are on their last legs. There are other tools that can be more thorough.</p><p><a href="http://www.mac-forums.com/forums/os-x-operating-system/267379-too-much-space-used-hard-drive.html#post1372971" target="_blank">http://www.mac-forums.com/forums/os-x-operating-system/267379-too-much-space-used-hard-drive.html#post1372971</a></p></blockquote><p></p>
[QUOTE="Lifeisabeach, post: 1455415, member: 38864"] I agree that the hard drive is sounding like the culprit here. CHSCAG beat me to it, but I can only re-iterate what he said... the fan running constantly will only lead to the bearings wearing out prematurely, which will then lead to the hard drive overheating and failing. As an alternative to SMC control, you can always have that thermal sensor cable replaced. I almost did so myself when I replaced my HDD in my 2010 iMac (I really didn't want to stick with Seagate either), but decided I didn't want to mess with that also (and I did stick with Seagate... I hope that doesn't come back to haunt me!). Here's the link to the correct item: [url=http://www.powerbookmedic.com/iMac-27-Hard-Drive-Temperature-Sensor-p-21364.html]iMac 27" Hard Drive Temperature Sensor[/url] Now then, you really need to test your hard drive out. See this post of mine (linked below) for details. The standard SMART test that is often recommended and performed by Onyx is a good start, but everything I've read suggests it will only show pending failure for drives that are on their last legs. There are other tools that can be more thorough. [url]http://www.mac-forums.com/forums/os-x-operating-system/267379-too-much-space-used-hard-drive.html#post1372971[/url] [/QUOTE]
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Apple Computing Products:
macOS - Desktop Hardware
iMac Suddenly Slow Performance - Please Help?
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