In Automator, create a Calendar Alarm Select Utilities from the library pane Select & drag Run AppleScript into the workflow area Copy/paste the AppleScript into the Run AppleScript box Save the newly created Calendar Alarm Open Calendar.app, create a new event Select the Automator calendar as your reference calendar Select Open File for the alert, and select the file you created in Automator. By default, iCal is the file that comes up when you select Open File. Change that to the name of the Automator app you created. Select Other if the file name isn't shown.
Apple recommends charging and discharging its battery at least once per month.
Go to System->Library->CoreServices inside your OS X hard drive and open the file "SystemVersion.plist" with TextEdit. Change the system version listed under "ProductVersion" to whatever you desire.
You might not be able to write to the file because it's system-protected (in Lion, TextEdit will let you unlock system files). To work around this problem, "Save As" this file to the desktop, or some other random place where you can find it. While saving it, make sure you uncheck the option to convert it into a .txt file.