Operating System For Mac

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Most of the time you'll never have to worry about having to install a new operating system on your Mac - the one that's on there should work fine through thick and thin. But every once in a while you might want or need to - here are step by step instructions for making it happen.

Use Recovery Mode

Every Mac operating system since Lion (OS X 10.7) has included Recovery Mode, a special boot partition that enables you to recover from catastrophic failures and problems. This can be used to install a fresh copy of Mavericks on your hard drive, provided you have Internet access. To use Recovery Mode, follow these instructions:

  1. Shut down your Mac.
  2. Press the Power button (the button marked with a O with a 1 through it)
  3. Immediately press the command (cloverleaf) key and R together.
  4. Make sure you're connected to the internet through Wi-Fi. If you're not, choose a network from the Wi-Fi menu that appears at the top-right corner of the screen.
  5. Select Install Mac OS X, then click Continue.
  6. Wait.

The current Mac operating system is macOS, originally named 'Mac OS X' until 2012 and then 'OS X' until 2016. Developed between 1997 and 2001 after Apple's purchase of NeXT, Mac OS X brought an entirely new architecture based on NeXTSTEP, a Unix system, that eliminated many of the technical challenges that the classic Mac OS faced. But as it often happens, workarounds are possible. There is still a chance to download the installation file if you have an access to a Mac (or virtual machine) running that operating system. For example, to get an installer for Lion, you may ask a friend who has Lion-operated Mac or, once again, set up a virtual machine running Lion.

It's worth noting that this installs a fresh copy of OS X on your Mac without affecting either your files or your user settings, so you should be good to go as soon as it reboots. All applications are maintained, as well. This system simply replaces the core files that enable OS X to operate.

I've had occasion to see systems that don't work with Recovery Mode, for some reason. For those computers, it's often possible to restore access to the Recovery Mode partition by resetting the System Management Controller (SMC). To reset the SMC on most Macs:

  1. Shut down the Mac. If it's a laptop, make sure it's connected to the power cord.
  2. Hold down the Control, Option, and Left Shift keys simultaneously, then press the Power button.
  3. Release the keys.
  4. Press the Power button again. The system should turn on and you can give Recovery Mode another try.

If that fails to work, you can always download a fresh copy of the Mavericks installer from the Mac App Store.

Download a fresh copy of Mavericks from the Mac App Store

  1. Open the Mac App Store application, either from your Dock or from the Applications folder.
  2. Click on the Purchases tab at the top of the window or press command and 4 on your keyboard. (I'll assume for the moment that you have already installed Mavericks once - if you haven't, you should see an installation option in your Updates folder, assuming you have Snow Leopard or later installed.)
  3. Find OS X Mavericks in the list of files, either scrolling through the list or using the Search field in the upper right hand corner of the window.
  4. Click the Download button.
  5. You may get a dialog box advising you that OS X 10.9 is already installed on this computer. It's safe to click the Continue button.
  6. Be prepared to wait a while. Even over a fast Internet connection, it'll take a little while to download, since it's more than 5 GB.
  7. Once it's downloaded, it'll launch automatically. Follow the directions to install OS X.

Hopefully this will help you get started if you need to install a fresh copy of Mavericks. Questions? Fire away in the comments.

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Apple has updated Mac operating system to macOS 10.13 High Sierra. You probably want to upgrade your Mac/iMac/MacBook to get all the exciting new features. Before you actually do that, read this tutorial and follow the right steps to install and upgrade your iMac or MacBook to the latest Mac OS version.

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How to Upgrade to macOS High Sierra

1. Check the compatibility of the latest Mac OS

Before rushing into anything, you should make sure that your iMac, MacBook Air, MacBook Pro, Mac Mini, Mac Pro supports the latest version of Mac OS. Here is the list of Mac models that are compatible with macOS High Sierra.

  • MacBook (Late 2009 or newer)

  • MacBook Pro (Mid 2010 or newer)

  • MacBook Air (Late 2010 or newer)

  • Mac mini (Mid 2010 or newer)

  • iMac (Late 2009 or newer)

  • Mac Pro (Mid 2010 or newer)

Also, your Mac is required to run on OS X 10.8 or later. The OS versions that can be upgraded to High Sierra include OS X Mountain Lion v10.8, OS X Mavericks v10.9, OS X Yosemite v10.10, OS X El Capitan v10.11.

2. Make sure there is enough space for the update

Mac Os Versions List

You would fail to install the new Mac OS if there is not enough space for the update. Therefore, before installing macOS High Sierra on your Mac, check your Mac storage before the upgrade.

RAM

You need 2GB RAM to run High Sierra, which won't be a problem since all supported Mac models have at least 4GB RAM.

Disk Space

Apple suggests that you should have 14.3GB of free storage on the disk before installing High Sierra. To check your Mac storage: Click Apple icon > About this Mac. Select Storage and see how much free storage left.

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3. Get your current macOS up-to-date

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For example, if your Mac is running on macOS Sierra, it is better to update the OS to the latest version of Sierra, which is macOS 10.12.6. It is not a must step, but usually, it is more likely to successfully install a major macOS update from the newest version.

To update your current macOS, click Apple logo, choose Software Update and receive any available update.

4. Backup your Mac with Time Machine

Before installing a new macOS update, it is important to back up your Mac so that you can restore the backup if anything goes wrong during the upgrade or you don't like the new macOS. You can back up your Mac with Time Machine.

Operating system for mac 10.5.8

5. Download and install macOS High Sierra

You can download the latest version of macOS High Sierra directly from App Store.

  • Open Mac App Store and search macOS.

  • In the search result, choose macOS High Sierra and click Download.

  • When the macOS High Sierra installer is downloaded. A window will pop up asking you to continue to install the Mac software.

  • Click Continue and follow the on-screen instruction to install the macOS High Sierra. Your Mac will restart.

6. Automatically install macOS update(optional)

If you would like to keep your Mac OS up-to-date in the future, you can set up your Mac to automatically download system update.

System

  • Run System Preferences and select App Store;

  • Tick Install macOS updates.

Can I Install High Sierra on An Older Mac?

Apple won't let 2008 Mac, iMac, MacBook or earlier models to install macOS High Sierra. Is this mean that an older Mac has no chance to get the new features? Not really. A macOS Sierra Patch Tool written by a developer named DOSDude1 is available for early-2008 or newer Mac Pro, iMac, or MacBook Pro, late-2008 or newer MacBook Air, early-2009 or newer Mac Mini. So if your Mac is supported, you may use the patch tool, to install High Sierra on Mac from an external drive.

However, you should know that as Apple forbids the installation of macOS High Sierra on these Macs, using this third-party patch tool to install the Mac OS on an incompatible device may cause problems on your Mac, at least will slow down your Mac. If you are prepared for the problems that may come along and still interested in the new operating system, you may give the patch tool a shot.

Should I Upgrade My Mac OS Right Away?

When a new OS, e.g. macOS High Sierra, is released, the first question that comes to your mind could be: should I upgrade my Mac to the new macOS? Well, when a new major update is just released, it is better not to get the update right away. Here are the reasons.

  • Many apps haven't been updated and can't work with the new macOS.

  • There are still bugs with the new release. You should wait for the stable version.

  • Some new features in High Sierra need to work with compatible iOS devices, for example, Handoff, Auto Unlock. Without the iPhone or Apple Watch, it seems less exciting to upgrade to High Sierra right away.

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High Sierra Operating System For Mac

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