Introduction
Upgrade your hard drive for more storage space!
This guide also includes steps to upgrade your iMac's hard drive with a SSD. It describes how to install the SSD's temperature sensor so that the Mac's fans will operate at the correct speed.
Before beginning any work on your iMac: Unplug the computer and press and hold the power button for ten seconds to discharge the power supply's capacitors.
Be very careful not to touch the capacitor leads or any exposed solder joints on the back of the power supply.
What you need
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Disconnect the thermal sensor, SATA power, and SATA data cables by pulling their connectors away from the sockets on the hard drive.
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Slightly rotate the hard drive away from the outer case.
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Lift the hard drive off its two lower positioning pins and remove it from the outer case.
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Remove the two T8 Torx screws securing the upper bracket to the hard drive.
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Remove the upper bracket from the hard drive.
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