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Nov 29, 2017 Before you do it, the best advice is to back your Mac up so your most important files stay intact. In addition to that, it makes sense to clean up your Mac from old system junk files and application leftovers. The easiest way to do it is to run CleanMyMac X on your machine (download it for free here). Apr 26, 2021 From the Apple menu  in the corner of your screen, choose About This Mac. You should see the macOS name, such as macOS Big Sur, followed by its version number. If you need to know the build number as well, click the version number to see it. Which macOS version is the latest? MacOS Big Sur elevates the most advanced desktop operating system in the world to a new level of power and beauty. Experience Mac to the fullest with a refined new design. Enjoy the biggest Safari update ever. Discover new features for Maps and Messages. And get even more transparency around your privacy. Bootable BD Blu-ray Disc for Mac OS X 11.0 Big Sur Full OS Install, Recovery and Upgrade. 1.0 out of 5 stars 1. Only 1 left in stock - order soon. Bootable BD Blu-ray Disc for Mac OS X 10.15 Catalina Full OS Install, Recovery and Upgrade.

Mac OS X Guide

Mac OS X is the operating system on your Mac. It's a fast, secure and easy-to-use operating system that you will fall in love with immediately.

Mac OS X Introduction

Mac OS X is the operating system of your Mac. It is incredibly powerful yet very simple to use. With our simple guide you will become an OS X pro in no time.

Find Out Which MacOS Your Mac Is Using - Apple Support

Browsing Through Files

Browsing files on your Mac is easy. We'll teach you how to create folders, organize files and much more that will make you a more efficient Mac user.

Install Applications

Installing applications on a Mac couldn't be easier. In a few minutes, you can fill your Mac with new apps that you can download online.

Spotlight Search

Mac OS X has a great built-it search function called Spotlight that helps you find any file on your Mac. Never loose an email or a document again!

The Dock

The Dock gives you quick access to your applications from anywhere on your Mac. It's the fastest and most convenient way of opening any application.

System Preferences

Your Mac is full of settings that will help you configure it to better suit your needs. Just click System Preferences to get started.

Keyboard Shortcuts

Using keyboard shortcuts is the best way for beginners to become more efficient Mac users. Close? Open? Minimize? There is a shortcut for that.

Changing Your Mac’s Desktop Background

It's very easy to change the desktop background (or “wallpaper”) of your Mac. Our short guide will show you how in just a few clicks.

Changing icons

Looking for fun new ways of making your Mac more personal? If you want, you can replace the icons of any application on your Mac.

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Print Screen On A Mac

Mac users can easily take a “print screen”, which means saving a copy of what's on your Mac's screen at the moment. This copy will be saved as an image on your desktop. It's a great way of sharing what exactly you're seeing on your Mac's screen.

Burning files to a CD or DVD

Your Mac makes it incredibly easy to burn CDs and DVDs with your own files. Just create a new folder, add your personal files and press burn.

Creating a Guest Login

Guest logins is a convenient and secure way of letting friends (or strangers) use your Mac without letting them access your personal files.

Dashboard & Widgets

Mac OS X supports mini-programs call Widgets that gives you easy and fast access to basic information like weather, sports results and traffic information.

Exposé

If you have many applications and windows open at the same time, it may be hard to find the right window. Using exposé your problems are solved.

Force Quitting Applications

Sometimes, even the best of apps get stuck and won't quit, no matter how hard you try. Don't worry, you can always force quit applications.

Password protect your Mac’s screensaver

Protecting your Mac with a screensaver password is a good way to make sure your personal data stays private, even when leaving your Mac among friends and colleagues.

Right-clicking

Macs doesn't have right click buttons, something that often confuses new “switchers”. Instead, it has the right-click which work similarly.

Screensaver Password Protection

If you keep your Mac in a public place like an office or a university, you should definitely add a password to your screensaver. It only takes a minute!

Screensavers

The purpose of screensavers is to keep your screen from aging prematurely. As an added bonus, it makes your Mac look gorgeous when not used.

Is your Mac up to date with the latest version of the Mac operating system? Is it using the version required by a product you want to use with your Mac? Which versions are earlier (older) or later (newer, more recent)? To find out, learn which version is installed now.

If your macOS isn't up to date, you may be able to update to a later version.

Which macOS version is installed?

From the Apple menu  in the corner of your screen, choose About This Mac. You should see the macOS name, such as macOS Big Sur, followed by its version number. If you need to know the build number as well, click the version number to see it.

What is the latest macOS version?

These are all Mac operating systems, starting with the most recent. When a major new macOS is released, it gets a new name, such as macOS Big Sur. As updates that change the macOS version number become available, this article will be updated to show the latest version of that macOS.

If your Mac is using an earlier version of any Mac operating system, you should install the latest Apple software updates, which can include important security updates and updates for the apps that are installed by macOS, such as Safari, Books, Messages, Mail, Music, Calendar and Photos.