In order to help users switch over, Google has provided an upgrade guide with a list of incompatibilites between the two versions.

为了帮助用户切换到新版本，Google 提供了一个升级指南并列出两个版本之间的不兼容之处。

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This is not intended as an official "how-to" guide, but a discussion on how I performed the upgrade and what decisions and considerations I made during the planning and execution phases.

本文不是官方指南，而是介绍我执行升级的过程，以及我在计划和执行阶段做出的决定和考虑的因素。

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If you need to upgrade, you can check out Adam's guide to installing memory, after determining the type of memory your computer needs.

如果你需要升级，你可以看看Adam的内存安装指南，然后再决定你的电脑需要哪一种类型的内存。

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