Apple Mac iBook

Resetting Power Management Unit

For iBook (16 VRAM) and later models of iBook, there is no physical reset button.

  1. If the computer is on, power it off
  2. Reset the power manager by simultaneously pressing and then releasing Shift-Control-Option-Power on the keyboard. Do not press the fn (Function) key while using this combination of keystrokes
  3. Wait 5 seconds
  4. Press the Power button to restart

The Option key is the key marked 'Alt'

http://docs.info.apple.com/article.html?artnum=14449#faq6

Mac OS X Keyboard Shortcuts

http://docs.info.apple.com/article.html?artnum=75459

Mac OS X 10.2: How to Show Menu Bar Items

http://docs.info.apple.com/article.html?artnum=75466

Cannot Change Network Settings

Accessing 'System Preferences -> Network' results in a dialog stating "Your network settings have been changed by another program". Clicking 'OK' loops and re-displays the same dialog.

It appears this was caused by some changes in an Apple update. Possible soluitions are as follows (assuming logged in as system administrator):

Solution 1

  1. 'Force Quit' the existing System Preferences application (Option on the Apple logo menu item)
  2. Select the System Preferences Application again, but choose the 'Personal -> Security' option
  3. Check the box 'Require password to unlock each secure system preference'
  4. Click 'Show All' button at top
  5. Quit the System Preferences application to effect the change
  6. Restart 'System Preferences' and select 'Internet & Network -> Network'. If the alert pops up, click 'OK'. It shouldn't pop up again.
  7. Click the padlock icon in the lower left of the window. You are prompted for your password
  8. Enter your password and click 'OK'. The padlock icon shows an unlocked icon and the 'Apply Now' button should be enabled
  9. If the 'Apply Now' button is enabled, click 'Apply Now' to save the changes the application thinks have been made. Otherwise, click 'Show All' - If you're not prompted to save changes, this fix probably isn't working and you'll need to hunt for another solution
  10. You should now be able to change the network settings without the infinitely looping dialog
  11. Optionally, go back into the 'Security' option and uncheck the box 'Require password to unlock each secure system preference' - However, after quitting and re-starting 'System Preferences' the problem re-occurred for me.

Solution 2

Use this option if you don't want to force entering the system administrator password for all secure system preferences. However, you'll still need to enter the password on the occasions you wish to access the network settings.

  1. If necessary, 'Force Quit' the existing System Preferences application (Option on the Apple logo menu item)
  2. Select the System Preferences Application again, but choose the 'Personal -> Security' option
  3. If the padlock icon shows the unlocked icon, click the padlock icon in the lower left of the window to lock it
  4. Click 'Show All' button at top
  5. Select 'Internet & Network -> Network'
  6. Click the padlock icon in the lower left of the window. You are prompted for your password
  7. Enter your password and click 'OK'. The padlock icon shows an unlocked icon and the 'Apply Now' button may be enabled
  8. You should now be able to change the network settings without the infinitely looping dialog. All should work well, until such time as you restart the 'System Preferences' application, when this procedure will need to be repeated.

Rescue CD

The following Live CD distributions should support PowerPC:

-- Frank Dean - 13 Mar 2010

References:

-- Frank Dean - 01 Jan 2009

-- Frank Dean - 25 Feb 2006

Related Topics: InstallingKitlistMacOSX, InstallingMacPorts, MacKeyboardTips