Macworld说，在你跳到OSX10.5Leopard之前，你可以做一些事情来清理和准备你的Mac电脑。安装当前应用程序的最新版本（许多应用程序正在推出Leopard更新），清理硬盘，卸载不需要的软件，运行Apple硬件测试，并使用Disk Utility修复硬盘。文件和文件夹删除候选列表尤其令人印象深刻。首先是常见的罪魁祸首，如文档和应用程序，但要深入挖掘并摆脱积垢，请查看：

• In /Library, /Library/Application Support, ~/Library, and ~/Library/Application Support, look for folder names matching applicati*** you no longer use, and delete them.
• Your /Library and ~/Library folders may contain other folders that store components of third-party utilities. Look in Application Enhancers, Bundles, Contextual Menu Items, InputManagers, and PreferencePanes for any system enhancements you no longer use, and drag them to the Trash.
• Third-party Dashboard widgets live in ~/Library/Widgets. Any widgets you don't use can go.
• Applicati*** use cache files to increase their speed and efficiency, and rebuild them automatically if necessary, so you can delete them safely:
• The contents of /Library/Caches and ~/Library/Caches, can sometimes occupy hundreds of megabytes of valuable disk space. Drag these files to the Trash.
• You can empty Safari's cache by choosing Safari -> Empty Cache (Command-Option-E).
• Safari stores favic*** (those tiny ic*** that appear next to a site's URL in the address bar) separately from its main cache. To remove them, quit Safari and drag the folder ~/Library/Safari/Ic*** to the Trash.
• Software that requires some component to be running in the background all the time may install folders in /Library/StartupItems. In most cases, you should leave this folder alone, but if you see anything there from software you're sure you don't use, delete it.

别忘了，你也可以使用免费的DiskInventoryX来识别占用Mac硬盘的内容。至于Leopard升级，就我个人而言，我计划彻底清理我的Mac电脑，然后完全重新安装我的应用程序。这将是一个很好的清理和升级，作为一个Windows用户，干净安装的想法将使我更容易入睡。

让您的Mac为OS X 10.5[Macworld]做好准备