Aluminium iMac Hard Drive upgrade guide
Upgrading the internal hard drive in a 2007-2008 Apple iMac to 1.5TB
The following guide provides step-by-step instructions on how to disassemble and upgrade your Apple iMac 20" or 24" models.
T6 Torx Driver and T9 Torx Driver
Suction Cups for removing the glass front panel - These can be obtained from many DIY shops or online for less than £10
Philips Screwdriver for removing the memory cover.
New Hard Drive. I used a Seagate 1.5TB SATA 7200 rpm model which was £140
Please note this is not an official Apple guide so proceed at your own risk!
- Remove the memory slot cover from the base of the machine.
- Using the suction cups carefully place them on the glass screen cover and remove the glass panel. Place somewhere safe and clean.
- Remove the Torx screws from the front panel surround on the edge of the LCD screen (some of the screws are different sizes)
- Lift the screen away from the main chassis and life up and over above the computer
- Remove the screws holding the LCD panel to the chassis
- Remove 2 screws from the LCD connector and remove the connector from the graphics card
- Carefully lift the LCD panel from the bottom to expose the 4 small connectors for the backlight. Mark the connectors with a marker to aid in reassembly and disconnecting the connectors
- Lift the panel clear of the chassis
- Remove the hard drive temperate sensor and place on one side
- Unclip the hard drive from the chassis. This plastic bracket can be a tight fit so some force is required to remove it
- Remove the power and SATA connectors from the hard drive and remove them from the chassis
- Remove the screws holding the plastic clip from the hard drive and the 2 mounting pins from the other side of the hard drive
- Fit the clip and pins to the new hard drive
- Reconnect the power and SATA connectors and clip the new hard drive back into the computer chassis
- Refit the LCD screen and reconnect the 4 small backlight connectors
- Place the LCD panel flat on the chassis and reconnect the screen connector and refit the two small screws
- Refit all the screws from the edge of the LCD screen
- Refit the front panel and take care not to trap the small cable at the top of the screen
- Refit all the front panel screws in the same order as they were removed (some of the screws are different sizes)
- Clean any dust from the LCD panel and the front glass panel using a soft screen cleaning cloth (don't use compressed air as this often leaves propellant on the screen which is very hard to remove)
- Remove the suction cups from the screen and clean the glass.
- Refit the memory slot cover on the base of the machine.
Next, you need to reinstall OS X from your operating system disks and then your upgraded iMac is ready to use!