I recently was using iPhoto on my Mac Powerbook, and received an error:

An error occurred while trying to save your photo library.

It also said:

Some recent changes may be lost. Make sure your hard disk has enough space and that iPhoto is able to access the iPhoto Library.

I was lost about what to do. Luckily I found this post about the issue.

As instructed, I…

1. Downloaded BatchChmod.

2. Using this software, I applied the settings below to my iPhoto Library Folder.

Image Source

These steps worked great. I no longer have the annoying error message.

You might be bored of the typical colors on your Mac OS X Leopard computer. Many people like to invert the colors because it may be easier on your eyes. Here’s how:

1. Open System Preferences.

2. Locate the row labeled System.

3. In the System area, open Universal Access.

4. Under Display area, press the White on Black button.

How to reset or zap the PRAM in Mac OS X: Leopard.

1. Restart your computer while holding down the keys Command+Option+P+R.

2. Wait for your computer to chime twice before releasing the keys.

The screen will flash when the PRAM resets.

Mac OS X Leopard users have been looking for a way to make the Leopard sidebar icons larger. We’ve seen quite a few emails asking us if there is a way. However, there is no current way to make the Sidebar icons bigger. We urge you to let your Leopard desires be known to Apple.

Enable or disable Mac OS X: Leopard from prompting for a password after waking up from a screen saver or sleep.

1. Open System Preferences.

2. Open Security under the Personal section.

3. Click the System button.

4. To disable the password prompt, uncheck the box for Require password to wake this computer from sleep or screen saver.  To enable it, place a check in the box.

How to enable or disable the built in Mac OS X: Leopard firewall.

1. Open System Preferences.

2. Open Security under the Personal section.

3. Click the Firewall button.

4. Do one of the following:

• Select Block all incoming connections to enable the firewall to block all incoming connections. Certain programs may not function with this setting though.
• Select Limit incoming connections to specific services and applications, then click the arrow next to Services to expand the list of services and then use the menu to the right of each service to allow ir disallow connections. You can do the same with Applications.
• Select Allow all incoming connections to disable the firewall.

5. Close System Preferences when you’re finished.

Make RSS feed headlines into a screen saver in Mac OS X: Leopard.

1. Open System Preferences…

2. Open Desktop & Screen Saver.

3. Click the Screen Saver tab.

4.  In the left-hand pane, choose RSS Visualizer.

5.  Click the Options… button to choose your a feed.  Close the pane when you are finished.

How to add a BlueTooth device in Mac OS X: Leopard.

1. Open System Preferences > Bluetooth.

2. Ensure Bluetooth Power and Discoverable is turned on.

3. Click the + button.

4. Click the kind of device you have, and click Continue.

5. Click the name of the device you are adding, and click Continue.

6. You may get a prompt to enter a password. Enter the password for the device you are adding. The password should be either on the BlueTooth device or in the manual. Follow prompts on the device if necessary.

By default, Time Machine performs a backup every 3600 seconds. You can change this setting with Terminal commands. This example sets it to 9600 seconds.

1. Launch Terminal from the Utilities folder.

2. Type the following and press Return or Enter on your keyboard.

sudo defaults write /System/Library/LaunchDaemons/com.apple.backupd-auto StartInterval -int 9600   

Now Time Machine will backup your items every 9600 seconds. You can change the 9600 value to whatever you like.

How to change the workgroup name in Mac OS X: Leopard.

1. Open System Preferences from the Apple menu.

2. Open the Network icon in the Internet & Network area.

3. Select the network connection you use to connect to the Windows network.

4. Click Advanced.

5. Click WINS.

6. Type the name of the Windows workgroup in the Workgroup field.

7. Click OK and then click Apply.

In Mac OS X: Leopard, the System Profiler can be used to find technical specs on your mac such as the processor type and speed, type of cache, and the file system. For you Windows users, it’s basically the same as the System Information application. There are many ways to open the System Profiler:

• Launch it from the /Applications/Utilites folder.
• Hold down the Option key while choosing Apple > About This Mac, and the menu item will change to System Profiler.
• Choose Apple > About This Mac and click More Info…

How to create a PDF in Mac OS X Leopard.

1. Create or open a document in any application.

2. Click Edit > Print.

3. Choose PDF > Save as PDF.

4. Provide a filename in the Save as field.

5. Choose where to save the file in the here menu.

6. Click Save and you have a PDF version of the document.

A problem can sometimes occur where iCal doesn’t open. The screen flashes briefly, but never opens. Try the following steps to fix this problem.

1. Navigate to  Home/Library/Calendars/Calendar Cache.

2. Trash all of the files in the Calendar Cache directory.

Now try iCal, it should work fine.

You have a problem opening the Keyboard & Mouse Preferences. It just stays at Loading Keyboard & Mouse.

To fix this problem, try the following:

1. Navigate to User/Library/Preferences.

2. Delete the com.apple.systempreferences.plist file.

Now you should be able to access the Keyboard & Mouse Preferences. This will also fix any problems you may experience with function keys on your keyboard such as F1 through F12 not working.

How to allow Windows computers to connect to your shared files in Mac OS X Leopard.

1. Open System Preferences.

2. Open Sharing under Internet & Networking.

3. Provide a name in the Computer Name field. This will be the name that other computers see on the network.

4. Check the box for File Sharing.

5. Click Options…

6. Check the box for Share Files and Folders using SMB.

7. Check the accounts that you wish to allow access to your computer over the network.

8. Click Done and close System Preferences.

Now Windows Computers will be able to access the files you are sharing on your Mac.