How to Delete iPhone Crash Logs

Tap “Settings” on your iPhone, followed by “General.” Next, choose “About,” followed by “Diagnostics & Usage” and “Diagnostic & Usage Data.” Observe the list of crash, usage and diagnostic reports logged on your device. If you wish to review the detail of an individual item, tap it.
Launch iTunes on your computer. Next, connect your iPhone using its supplied USB cable. Choose your iPhone’s name under Devices in the left sidebar.
Click “Sync” in the lower right corner of your desktop’s screen. The sync process begins and advances through several steps. You can check its progress in the area above the main pane’s navigation bar.
Return to Diagnostics & Usage Data screen on your iPhone. You’ll see that most, if not all, the previously logged items no longer appear, having been copied to your computer and erased from your device during the sync.
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How to Switch Users in Mac OS Tiger

Click on the Apple icon in the Finder bar.
Scroll down to the 'Log Out' menu option. Notice it will also display the name of the user who is currently logged into Mac OS Tiger.
Wait for the user to completely log out. Once he has, the Mac OS Tiger welcome screen and login box will appear.
Switch users by entering your username and password into the login window and pressing the Return key. If the window appears to shake after trying to switch users, then you have entered an incorrect password and must reenter it.
Check the box that asks if you'd like to enable fast user switching.
Press the red jewel to close the Accounts registry and begin fast user switching.
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