
Upgrading your Mac to Lion Server couldn’t be more hassle free — whether you’re running Snow Leopard or Snow Leopard Server. Just visit the Mac App Store to buy, download, and install both directly to your Mac. That’s it. And since Lion Server is available from the Mac App Store, you can upgrade from Lion any time you want.
To upgrade to Lion Server:
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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.
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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.
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Step 3: Download OS X Lion and Lion Server from the Mac App Store.
Open the Mac App Store from your Dock to buy and download Lion and Lion Server.