![]() ![]() Once your Mac has booted from the recovery partition/usb you may have to pass a setup for your language preferences first. Upon boot you hold ⌥ and choose the recovery disk. Using this method, an install of Lion requires an internet connection. Apples offers the Lion Recovery Disk Assistant to create your own Lion install USB.This will display all options of where your Mac can boot from. The recovery partition exists on every Mac that came shipped with Lion or had Lion installed as a clean install. In order to directly boot into the recovery partition. The OS X Lion download is about 4 GB large. OS X Lion isĭownloaded over the Internet from Apple when Lion Recovery is used for The Internet via Wi-Fi or an Ethernet connection. Reinstalling OS X Lion via Lion Recovery requires broadband access to Lion Recovery (requires internet connection) You can boot into your DVD or flash drive from there. Reboot into OS X and hold the option key when you hear the startup chime. Hit the “Apply” button and it will create your bootable USB drive. Hit the “Apply” button when you’re done to format your drive (note: it will erase everything on the drive).Ĭlick on the “Restore” tab, choose the InstallESD.dmg file as the source and your flash drive as the destination. You’ll need this to make the drive bootable on a Mac. ![]() Hit the “Options” button under the partition table and choose “GUID Partition Table”.Choose “Mac OS Extended (Journaled)” on the left. Go to the Partition tab and select “1 Partition” from the dropdown menu. If you want to burn Lion to a USB flash drive, plug it in and click on it in the left-hand sidebar in Disk Utility.If you’re burning it to a DVD, insert your DVD, select the disk image in the sidebar, and hit the “Burn” button. Open up Disk Utility and drag the DMG file into the left-hand sidebar.Navigate to Contents/SharedSupport and look for a file called InstallESD.dmg. Right-click on the installer and hit “Show Package Contents”.The installer should show up in your Applications folder. Buy and download Lion from the Mac App Store.Do not close the lid or power off your Mac until installation is complete.Create a bootable OS X Lion USB stick or DVD based on the Mac App Store download During installation, your Mac may restart, or display a blank screen for a short time.In the Updates window, locate the line that says Catalina.In the App Store, on the left side of the window, select Updates.In the menu bar, click the Apple icon to open the Apple menu.Do not close the lid or power off your Mac until installation is complete.Īfter you've gone through the preparation steps, you need to download and install the latest version of macOS. During installation, your Mac may restart, or display a blank screen short time.When this process is complete, an installer application named Install OS X El Capitan is placed in your Applications folder.Follow the on-screen instructions to perform a compatibility check, and prepare for installation.In the archive, double-click InstallMacOSX.pkg.Double-click the downloaded archive, InstallMacOSX.dmg, to view its contents.The file size is 5.8 GB, so the download may take a while, depending on the speed of your Internet connection. Download the El Capitan installer from Apple.If your Mac is running OS X Lion or Mountain Lion, follow these steps to upgrade to El Capitan. If your Mac is running Mavericks or newer, you can proceed to upgrade to Catalina. * If your Mac is running OS X Lion or Mountain Lion, you must upgrade to El Capitan before you can upgrade to Catalina. The following versions of OS X and macOS can be upgraded to macOS Catalina. If anything goes wrong, you can restore your Mac to its previous state. Back up your dataĪlthough not required, we strongly recommend you back up your Mac before proceeding with an upgrade. However, you can still try to upgrade to El Capitan. If your Mac is not on this list, you cannot upgrade to Catalina. ![]()
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