您也可以试试手工下载和升级。
Alternatively you could try the 'Manual Downloads and Upgrades' method.
下载和升级所需的时间最终决定于所安装的产品。
The time it takes to download and update will consequently depend on what all you have installed.
当前通过Mac APP Store来下载和升级是一个很慢但轻松的过程，其花费了我将近一小时的时间来下载超过3gb的安装文件，实际的升级过程也非常的缓慢。
It took me nearly an hour to download the over 3gb installation file. The actual upgrade process was also very slow.
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