OS X 10.7 Lion was introduced in 2011. OS X Lion saw more than 250 new features added including new multi-touch gestures, system-wide support for full-screen apps, Mission Control, Launchpad and a redesigned Mail app. OS X Lion is also the first Mac operating system to include the Mac App Store from the start.
With the release of the OS X Lion operating system for Mac computers, Apple ceased traditional distribution of physical retail discs and instead offered the OS as a download via the Mac App Store. This has left users with many questions regarding performing installation and reinstallation tasks that would have, in the past, required the. Download Mac OS X Lion 10.7.5 DMG free standalone setup. The Mac OS X Lion 10.7.5 DMG is an upgrade of OS X version 10.7 to improve the stability, compatibility, and security of the Mac. Mac OS X Lion 10.7.5 Review. Mac OS X Lion 10.7.5 DMG is an upgrade of OS X version 10.7 to improve the stability, compatibility, and security of the Mac.
Apple released OS X 10.7 Lion in July, 2011. It was the eighth major release of OS X.
Apple first previewed Lion at a special event it called 'Back to the Mac.' The event's theme heralded Apple's strategy with Lion: to integrate technology and user experience elements the company had previously developed for use in iOS. In total, Apple introduced 250 new or changed features in Lion.
Lion would be the last OS X upgrade that Apple distributed on physical media. Initially, the only way to get it was to download a Lion installer from the Mac App Store for $29.99. Within a few weeks Apple offered a $69 USB flash drive as an option for users unable or unwilling to download the software. Subsequent releases like Mountain Lion and Mavericks have been download-only.
iOS-style innovations introduced in Lion include support for fullscreen apps and multitouch gestures on trackpads and Apple's Magic Mouse. Lion also introduced Mission Control, the unified interface for controlling the Dashboard, Finder windows and individual applications. Launchpad was also introduced, a new app that made it easier to find applications installed on the Mac.
iCal, Address Book, Safari and other core applications gained interface refinements and new features. QuickTime incorporated elements of the previously-available pay-to-play QuickTime Pro,
Other new features included the introduction of AirDrop, a peer-to-peer file-sharing technology that enables Mac users to exchange files over local Wi-Fi connections. FileVault disk encryption was strengthened with FileVault 2. And Lion also saw the introduction of Recovery Partition, a portion of the hard disk allocated for disk repair and system recovery tools.
Lion was also the first version of OS X to integrate the Mac App Store from the start — the Mac App Store made its debut after Snow Leopard's release.
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Reinstall from macOS Recovery
macOS Recovery makes it easy to reinstall the Mac operating system, even if you need to erase your startup disk first. All you need is a connection to the Internet. If a wireless network is available, you can choose it from the Wi-Fi menu , which is also available in macOS Recovery.
1. Start up from macOS Recovery
To start up from macOS Recovery, turn on your Mac and immediately press and hold one of the following sets of keys on your keyboard. Release the keys when you see an Apple logo, spinning globe, or other startup screen.
Command (⌘)-R
Reinstall the latest macOS that was installed on your Mac (recommended).
Option-⌘-R
Upgrade to the latest macOS that is compatible with your Mac.
Shift-Option-⌘-R
Reinstall the macOS that came with your Mac, or the closest version still available.
You might be prompted to enter a password, such as a firmware password or the password of a user who is an administrator of this Mac. Enter the requested password to continue.
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When you see the utilities window, you have started up from macOS Recovery.
2. Decide whether to erase (format) your disk
You probably don't need to erase, unless you're selling, trading in, or giving away your Mac, or you have an issue that requires you to erase. If you need to erase before installing macOS, select Disk Utility from the Utilities window, then click Continue. Learn more about when and how to erase.
3. Install macOS
When you're ready to reinstall macOS, choose Reinstall macOS from the Utilities window. Then click Continue and follow the onscreen instructions. You will be asked to choose a disk on which to install.
If the installer asks to unlock your disk, enter the password you use to log in to your Mac.
If the installer doesn't see your disk, or it says that it can't install on your computer or volume, you might need to erase your disk first.
If the installer is for a different version of macOS than you expected, learn about macOS Recovery exceptions.
If the installer offers you the choice between installing on Macintosh HD or Macintosh HD - Data, choose Macintosh HD.
Please allow installation to complete without putting your Mac to sleep or closing its lid. During installation, your Mac might restart and show a progress bar several times, and the screen might be empty for minutes at a time.
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If your Mac restarts to a setup assistant, but you're selling, trading in, or giving away your Mac, press Command-Q to quit the assistant without completing setup. Then click Shut Down. When the new owner starts up the Mac, they can use their own information to complete setup.
macOS Recovery exceptions
The version of macOS offered by macOS Recovery might vary in some cases:
If macOS Sierra 10.12.4 or later has never been installed on this Mac, Option-Command-R installs the macOS that came with your Mac, or the closest version still available. And Shift-Option-Command-R isn't available.
If you erased your entire disk instead of just the startup volume on that disk, macOS Recovery might offer only the macOS that came with your Mac, or the closest version still available. You can upgrade to a later version afterward.
If your Mac has the Apple T2 Security Chip and you never installed a macOS update, Option-Command-R installs the latest macOS that was installed on your Mac.
If you just had your Mac logic board replaced during a repair, macOS Recovery might offer only the latest macOS that is compatible with your Mac.
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If you can't get macOS Recovery to offer the installer you want, you might be able to use one of the other ways to install macOS.
Other ways to install macOS
You can also install macOS from the App Store or Software Update preferences. If you can't install macOS Catalina, you might be able to install an earlier macOS, such as macOS Mojave, High Sierra, Sierra, El Capitan, or Yosemite.
Or create a bootable installer disk, then use that disk to install macOS on your Mac or another Mac.