Software To isolate a hardware issue from a software issue, refer to Apple Support article TS1388: Isolating issues in Mac OS X. Troubleshooting Techniques For more information about troubleshooting techniques, go to ATLAS > Elective Courses > OS X, and choose OS X Mavericks: Troubleshooting Techniques from the course list. For more information about firmware updates, refer to Apple Support articles: HT1557: About firmware updates for Intel-based Macs HT1237: EFI and SMC firmware updates for Intel-based Macs Firmware on Intel Mac computers is designed to be updated if necessary by running the OS X Software Update check (available in the Apple (ï£¿ ) menu) while the computer is connected to the Internet. Firmware is the name given to software that is written into memory circuits such as flash memory, that will hold the software code indefinitely, even when power is removed from the hardware.

Check Apple Support article HT1159: Mac OS X versions (builds) for computers to make sure system build is correct for this computer model.

Computers sometimes exhibit symptoms that indicate the wrong version of OS X system software is installed. General Troubleshooting Update Software and Firmware Important: Before you begin troubleshooting, ensure the correct version of OS X is installed, and check for and apply the latest software and firmware updates. Note: If replacing the VESA mount tongue, write the serial number on the underside of the VESA mount tongue.

When replacing the stand, use a fine-tip black permanent marker to neatly write the serial number on the bottom of the new stand. Note: If the computer has a VESA mount, the serial number is located on the underside of the VESA mount tongue. IMac (21.5-inch, Late 2012, Early 2013, Late 2013, Mid 2014), iMac (27-inch, Late 2012 and Late 2013), and iMac (Retina 5K, 27-inch, Late 2014): Serial Number Location The serial number for iMac (21.5-inch, Late 2012, Early 2013, Late 2013, Mid 2014), iMac (27-inch, Late 2012 and Late 2013), and iMac (Retina 5K, 27-inch, Late 2014) is located on the bottom of the stand. IMac (27-inch, Late 2012 and Late 2013) and iMac (Retina 5K, 27-inch, Late 2014): Overview iMac (27-inch, Late 2012 and Late 2013) and iMac (Retina 5K, 27-inch, Late 2014)įor full technical specifications, refer to /specs.

Replacing memory in imac 2013 model