Then follow the onscreen instructions to install Lion. Open the Mac App Store from your Dock to buy and download it. For Departmental purchases: Contact Kengshi or Paul.įor Personal purchases: Download OS X Lion from the Mac App Store.Make a bootable drive of Mac OS X Mountain Lion with a USB drive.Download a copy of Mac OS X. If you have Snow Leopard, click the Apple icon and choose Software Update to install Snow Leopard v10.6.8, the latest version. Recommended Reading: How to Clean Install OS X Mavericks 1. Get up to date with the latest version of OS X Snow Leopard to purchase OS X Lion from the Mac App Store. Make sure you have the latest version of Snow Leopard.So, if your Mac already has Snow Leopard installed but its version is 10.6.7 or earlier (check by choosing Apple Menu > About This Mac), be sure to update it to the latest version In order to purchase Lion from the Mac App Store, you must be running the latest version of Snow Leopard. I recommend starting with at least 20 GB of free space (before downloading the installer). An icon used to represent a menu that can be toggled by interacting with this icon. But my experience suggests that in real-world use, 8 GB is cutting it too close for comfort. And, in fact, a full install of Lion can, under optimal conditions, fit in less than 6 GB of disk space. Īpple says Lion requires 8 GB of free disk space-presumably not including the 4 GB or so you’ll need for the installer itself. If the installer doesn't see your disk, or it says that it can't install on your computer or volume. If the installer asks to unlock your disk, enter the password that you use to log in to your Mac. Click Continue, then follow the onscreen instructions. To see if a firmware update is available, check this Web page. Reinstalling macOS doesn't remove your personal data. Some computers may require updated EFI or SMC firmware to run Lion. Even though 2 GB is the official minimum, I strongly suggest having more, if your budget allows. 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.ĢGB physical RAM. Your Mac must have an Intel Core 2 Duo, Core i3, Core i5, Core i7, or Xeon processor to run Lion. If you only redoing the actual OSX partition and already had. Alternatively you can purchase a Lion install USB drive from your local Apple Store or online here for 70.00. Select empty USB drive and go to restore tab. Q: What are the minimum requirements for OS X 10.7 Lion?Ī: Listed below are some minimum requirements for upgrading to OS X 10.7 Lion. Add the InstallESD.dmg image to Disk Utility. andreas.ley Level 1 (5 points) 1:31 AM in response to mende1 Hello, thank you for the tip, but I cannot find Lion in the purchases tab. Download Mac OS X Lion from the Mac App Store (29.
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