Add Startup Programs in Mac OS X. Adding startup programs in Mac OS X is pretty easy and straightforward. To start off, click on the Apple icon appearing on the top-right corner and then select the option “System Preferences.”. Apple helps you keep your Mac secure with software updates. The best way to keep your Mac secure is to run the latest software. When new updates are available, macOS sends you a notification — or you can opt in to have updates installed automatically when your Mac is not in use. MacOS checks for new updates every day and starts applying them in the background, so it’s easier and faster.

1. I've Just Encountered The Same Problem (after I've Updated The Firmware). I've Tried To Reset The PRAM/PMU But Neither Fixed The Problem. I'm Still...
2. I Should Point Out That Audio Output On The SAME Machine Works Fine In Windows XP. The Mac Startup Chime Also. This Has To Be A Bug In The Mac O...

You might want the model name or serial number of your Mac when checking warranty coverage, searching for specifications, creating a home inventory, selling, giving away, or trading in your Mac, or learning whether it is compatible with the latest Mac operating system or other software or hardware.

Use About This Mac

From the Apple menu  in the corner of your screen, choose About This Mac. You should see an overview of your Mac, including its model name and serial number.

If you see a window like this, double-click the version number beneath “OS X” to show the serial number:

Use System Information

The System Information app also shows your Mac model and serial number. Open the app, then select Hardware on the left side of the System Information window. The model name and serial number appear on the right:

Other solutions

I've Just Encountered The Same Problem (after I've Updated The Firmware). I've Tried To Reset The PRAM/PMU But Neither Fixed The Problem. I'm Still...

I Should Point Out That Audio Output On The SAME Machine Works Fine In Windows XP. The Mac Startup Chime Also. This Has To Be A Bug In The Mac O...

• Look on the outside of your Mac, or check the original packaging, receipt, or invoice as described on the product-ID page for MacBook Pro, MacBook Air, MacBook, iMac, Mac mini, or Mac Pro.
• Sign in to appleid.apple.com, then look for your Mac in the Devices section. If you see your Mac there, click its name to see the model name and serial number.
• If you still need help, contact an Apple Store or Apple Authorized Service Provider.