The 'classic' Mac OS is the original Macintosh operating system that was introduced in 1984 alongside the first Macintosh and remained in primary use on Macs until the introduction of Mac OS X in 2001. Apple released the original Macintosh on January 24, 1984; its early system software was partially based on the Lisa OS and the Xerox PARC Alto computer, which former Apple CEO Steve Jobs.
Before installing this upgrade, make sure that your Mac is ready.
The Happy Mac icon was the normal bootup screen of the Macintosh, it was also used on floppy disks of System softwares. The Mac OS logo and rebranding marks it's debut on version 7.5.1. Released on March 23, 1995. This logo was used for the Mac OS X v10.0, code-named 'Cheetah', and v10.1, code-named 'Puma'. These versions were preceded by the Mac OS X Public Beta, code-named 'Kodiak'. Amazon Music Stream millions of songs: Amazon Advertising Find, attract, and engage customers: Amazon Drive Cloud storage from Amazon: 6pm Score deals on fashion brands.
Check compatibility
macOS Big Sur supports most Mac models introduced in 2013 and later.
View compatible Mac models
Make a backup
Before you upgrade, make a complete backup with Time Machine, or store your files in iCloud.
Learn how to back up your Mac
Free up space
If the installer needs more storage space to upgrade, you can free up space using tools that come with your Mac.
Free up storage space
Download macOS Big Sur
If you’re using macOS Mojave or later, choose Apple menu > System Preferences, then click Software Update. If you’re using an earlier macOS, use the App Store instead.
Learn how to download and install macOS Big SurGo to the App Store
Get to know macOS Big Sur
Learn about some of the new features of macOS Big Sur.
Control Center
Control Center brings favorite controls such as Bluetooth, Wi-Fi, Do Not Disturb, and Sound together in a single place—so you can easily adjust them at any time.
Use Control Center
Notification Center
Notification Center puts notifications and>
Safari
Customize your start page, navigate with ease using the new tab bar, and access a new privacy report to see just how Safari protects your privacy as you browse.
Get to know Safari
Maps
Discover great places around the world and navigate easier with guides, cycling directions, indoor maps, Look Around, electric vehicle routing, and more.
Messages
Send messages to friends and family using new tools that make it easier to keep track of group conversations and give you fun, engaging ways to express yourself.
Use MessagesLearn more on YouTube
Photos
Use the expanded editing capabilities in Photos to easily make simple changes and more advanced adjustments to your photos.
Learn how to edit your photos
Have a question?
Ask everyone. Our Apple Support Community can help you find answers.
MacBook Pro (15-inch, 2016) and later and MacBook Pro (13-inch, 2016, Four Thunderbolt 3 Ports) and later feature the Touch Bar, which changes automatically based on the application that you're using to show you relevant, familiar tools and controls. On some models, the Esc button appears on the left side of the Touch Bar, in the same place the physical Esc key appears on traditional keyboards.
Sometimes tools in the Touch Bar temporarily cover the Esc button:
You can choose a physical key to act as Esc, temporarily or permanently:
Choose Apple menu > System Preferences.
Select Keyboard.
In Keyboard preferences, click Modifier Keys.
Use one of the pop-up menus to choose another key to act as Esc.
For example, if you choose Escape to the right of the Control (^) Key label, pressing Control has the same results as pressing Esc: it closes menus that are open, and pressing Control-Option-Command makes the Force Quit Applications window appear.
You can return your keyboard to its original behavior by clicking Restore Defaults.
How to force apps to quit using Esc alternatives
You might not be able to use the Esc button in the Touch Bar if the app you're using becomes unresponsive.
If you need to use Esc to force an app to close, you can switch to another app and try Option-Command-Escape. You can also choose Apple menu > Force Quit.
If that doesn't work, or if your Touch Bar doesn't respond in any app, restart your Mac. Choose Apple menu > Restart or, if your Mac isn't responding, press and hold Touch ID (power button) until your Mac turns off.
Using Esc in Windows
When you use Boot Camp to run Windows 10 on your Mac, Esc is in the same place on the Touch Bar as it is when you're using macOS. Pitch shift mac os.
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You can also access Esc through the Windows on-screen keyboard. From the Windows menu, select the Windows Ease of Access menu item. Then select On-Screen Keyboard.