Upgrade to OS X Lion Server. From the Mac App Store.

Upgrading your Mac server from Snow Leopard Server to Lion Server couldn’t be more hassle free. Just visit the Mac App Store when Lion becomes available in July. Then click once to buy, download and install Lion and Lion Server directly to your Mac. That’s it.

To upgrade to Lion Server:

  1. Step 1: Make sure your Mac can run Lion.

    Your Mac must have an Intel Core 2 Duo, Core i3, Core i5, Core i7 or Xeon processor to run Lion. Find out if your current Mac has one of these processors by clicking the Apple icon at the top left of your screen, then choosing About This Mac.

  2. Step 2: Get the latest version of Snow Leopard or Snow Leopard Server.

    Get up to date with the latest version of OS X Snow Leopard or Snow Leopard Server to upgrade to OS X Lion Server from the Mac App Store. If you have Snow Leopard or Snow Leopard Server, click the Apple icon and choose Software Update to install the latest version.

  3. Step 3: Download OS X Lion and Lion Server from the Mac App Store.

    When OS X Lion is released in July, simply open the Mac App Store from your Dock to buy and download Lion and Lion Server.