Apple iMac, Early 2009 User's Guide
![Apple iMac, Early 2009 manual cover](/images/ce3051deb6926163a78f7453/thumbs/thumb175x175.webp)
To perform a factory reset, restart your iMac and hold the Command + R keys. This will boot into the recovery mode. From there, select Disk Utility to erase your hard drive, then reinstall macOS.
The iMac (Early 2009) supports up to 8GB of RAM using two 4GB DDR3 SDRAM SO-DIMM modules.
Check the power cable and outlet. Perform an SMC reset by unplugging the power, waiting 15 seconds, and plugging it back in. If it still doesn't turn on, consider contacting Apple Support.
Consider upgrading the RAM and hard drive to an SSD. Close unnecessary applications and check for software updates. Running Disk Utility to repair permissions might also help.
Use a soft, lint-free cloth slightly dampened with water or a screen cleaner. Avoid spraying liquids directly onto the screen.
The graphics card on the iMac (Early 2009) is soldered onto the motherboard and is not upgradable.
Use the Mini DisplayPort on the back of the iMac to connect a compatible external display using a Mini DisplayPort adapter or cable.
The iMac (Early 2009) can run up to macOS El Capitan (10.11).
Replacing the hard drive requires removing the screen and several internal components. It's advisable to follow a detailed guide or seek professional help due to the complexity involved.
The iMac (Early 2009) includes ports for Mini DisplayPort, FireWire 800, four USB 2.0, Ethernet, and audio in/out.