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.
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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