When you need one of these, for a 2011 iMac swap of HDD for SSD, , for example, you really need it. This cable does the trick, and keeps your Mac happy, since it has to stay informed of the temperature of your main storage device. This has worked very well for me.
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Does a great job of managing fan speeds the way Apple did. Only other solution is using a program called Mac Fan Speed
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Need to swap out your iMac's storage device, or already done so, and the system's fans are suddenly revving all the time? This little gadget not only returns the fans to normal operation, but will allow the iMac to pass Apple's Diagnostic scan. Highly recommended.
Verified purchase: Yes | Condition: New
The cable is needed for any imac 27 mid 2011 when a hard drive is being replaced. The value or price seems a little pricey but what can you do. It's the best value in the market place.
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Works great to fill the gap that apple creates by requiring a temperature sensor.
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