如果你的Mac是10.4.x，也就是Tiger的話，

在今天也可以升級Safari 4.1了。

新版本的更新項目如下：

Performance improvements for JavaScript, Top Sites, trackpad pinch gestures

Faster page loading with DNS prefetching and improved page caching

Bing search option in the Search Field

Improved support for HTML5

Improved auto-complete in the Smart Address Field

Improved tabbed browsing, with the option to automatically open webpages in tabs

當然，如果你是使用Leopard或Snow Leopard的話，也是有Safari更新，

不過是直接升級到Safari 5就是了。