iMac (21.5-inch, Late 2009) — General Troubleshooting 18
2010-11-18
General Troubleshooting
Wireless Troubleshooting
If you’re having issues with Bluetooth and wireless connectivity issues, refer to:
• Bluetooth Service Diagnostic (BSD) self-paced training
• Bluetooth Troubleshooting Course
• kBase #TS3048: Troubleshooting wireless mouse and keyboard issues
• kBase #HT3887: Wireless input devices: Bluetooth frequently asked questions
• kBase #HT1365: AirPort and Bluetooth: Potential source of interference for wireless
devices and networks
• kBase #HT3903: Apple Wireless Keyboard, Mouse, Trackpad: How to install batteries
Update System Software & Firmware
Important: Ensure the correct version Mac OS X and latest software and rmware updates have
been applied before you begin troubleshooting. Computers sometimes exhibit symptoms that
indicate the wrong Mac OS X system software is installed. Refer to:
kBase #TS3101: iMac (Late 2009): Using the correct Mac OS X system software
Firmware is the name given to software that is written into memory circuits such as ash
memory, that will hold the software code indenitely, even when power is removed from
the hardware. Firmware on Intel Mac computers is designed to be updated if necessary by
running the Mac OS X Software Update check (available in the Apple menu) while computer is
connected to the Internet. For more information about rmware updates, refer to:
kBase # HT1557: About rmware updates for Intel-based Macs
Troubleshooting Theory
For general information on troubleshooting theory, go to GSX and nd the Service Training
course menu link. From there you can access the Troubleshooting Theory self-paced course.
Hardware vs. Software
For information on how to isolate a hardware issue from a software issue, refer to:
kBase #TS1388: Isolating issues in Mac OS X
For information on how to troubleshoot a software issue, refer to:
kBase #HT1199: Mac OS X: How to troubleshoot a software issue
kBase #TS1394: Mac OS X: Troubleshooting installation and software updates
kBase #HT2956: Troubleshooting Mac OS X installation from CD or DVD
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