Apple Os X Mountain Lion


OS X 10.8 'Mountain Lion' Q&A - Updated September 24, 2012

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Official OS X Mountain Lion.app Installer from the Mac App Store. Both versions 10.8.4 AND 10.8.5 full installers included (zipped). Un-archive the zip archive and you will get the app Installer. A bootable ISO or bootable USB can be made directly from the InstallESD.dmg disk image found under Contents/SharedSupport/. Overview If you need to purchase Mac OS X 10.8 Mountain Lion, you can order it from this page. The current version of the Mac operating system is macOS Catalina. To learn more, please click here. The other big social element of Mountain Lion is Messages, the OS X version of iMessage on iOS devices. Replacing iChat, Messages replicates the functionality of SMS and MMS between Mac, iPhone. Like Lion (OS X 10.7) before it, Mountain Lion (OS X 10.8) doesn’t ship on a disc—it’s available only as an installer app downloadable from the Mac App Store, and that installer doesn’t.

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Apple Os X Mountain Lion

What are the 'pros and cons' of upgrading to OS X 10.8 'Mountain Lion'? Is it worth it? What are the best reasons to upgrade? Are there reasons not to upgrade?

Much like OS X Lion before it, OS X Mountain Lion is a minor upgrade. It also is only US$19.99, which is the cheapest operating system upgrade Apple ever has released and yet it introduces 'over 200 new features.'

However, whether or not upgrading is 'worth it' has little to do with its low cost. Instead, you will have to decide whether or not a feature or features are compelling to you; and if so, if the operating system itself and desired features actually are supported by your Mac.

Apple Os X Mountain Lion

200+ New Features

Apple Os X Mountain Lion

Apple's official promo copy for OS X Mountain Lion lists the 200+ new features, many of which are directly inspired by the iOS.

Different people may have different opinions about which features are important, and given the cost of the operating system upgrade -- provided that one's computer is compatible -- a single feature might be worth the upgrade price to a particular individual.

For example, Mountain Lion supports '14 new braille displays' which could be quite valuable to the blind and 'better handwriting recognition' in Chinese, which could be greatly appreciated by Chinese speakers who prefer 'old school' handwriting input over pinyin.

For the majority of users, the most valuable additions are likely to be an improved version of Time Machine that supports multiple backup locations as well as the AirPlay Mirroring, iCloud, Dictation, Messages, Notes, Reminders, and Notification Center all borrowed from the iOS.

Users who always have wished that the Mac was more like the iPad or iPhone should be thrilled by these additions. Although they should carefully note that AirPlay Mirroring (as well as Power Nap) only are supported by a small subset of systems capable of running Mountain Lion. Many have failed to heed the fine print regarding compatibility and have been upset to find that a feature they really wanted wasn't supported by their Mac.

Long-term Mac users who are less interested in the iOS, those who aren't comfortable storing their personal information in 'the cloud,' and those who aren't avid users of social media are far less likely to find much compelling about the upgrade, even if it was free. Likewise, for those with unsupported systems, peripherals, or software, there is unlikely to be a reason to immediately upgrade, if at all.

Any individual may have different pros and cons, but the most common likely are:


  • AirPlay Mirroring makes it easy to wirelessly mirror the contents of a Mac's screen to an HDTV via a 2nd Gen or 3rd Gen Apple TV.
  • AirDrop, originally introduced with OS X Lion, makes it quicker and safer to share files with those nearby.
  • Power Nap conveniently performs automatic tasks while the Mac is asleep.
  • Auto Save enhancements may be welcomed by inexperienced users.
  • iCloud, Dictation, Messages, Notes, Reminders, and Notification Center features from the iOS have been added.
  • Improved Time Machine that supports multiple backup locations.
  • Improved Accessibility, Chinese options, and integration with social media.


  • Abandons many Macs that likely could have been supported. Third-party hacks, to varying degrees of success, are available, and these Macs are fully supported by Microsoft running Windows 8.
  • AirPlay Mirroring is only supported by a subset of Macs that are compatible with Mountain Lion. Third-party applications are available to perform the same and similar tasks on older hardware.
  • Power Nap only is supported by a small handful of Macs that are compatible with Mountain Lion.
  • As released, 'Save As' was a disaster (Thankfully, this was fixed by the 10.8.2 update).
  • Just like Lion, gestures, scroll direction and visibility changes, resize window changes, and other interface modifications may frustrate long-term Mac users. Feelings are strong enough that third-party 'fixes' remain available for some of these 'features.'

Upgrade Value Summary

Just like those deciding whether or not to upgrade to Lion, Intel-based Mac users likely will fall into one of three categories.

For those with compatible Macs and compatible software -- and particularly those who have a fully compatible Mac as well as an Apple TV and/or an iPod touch, iPhone, or iPad -- it is highly likely that a feature or features provided by OS X Mountain Lion will be well worth the cost. Nevertheless, those with 'mission critical' Macs still would be wise to wait for a couple of additional revisions to sort out remaining bugs.

For those with completely incompatible Macs, or even those with compatible Macs that don't support all of the features and/or who don't have an Apple TV and/or an iPod touch, iPhone, or iPad, OS X Mountain Lion probably isn't a reason to immediately buy a new or newer Mac, even if their software library is largely compatible. However, OS X Mountain Lion is likely to be appreciated in the future.

For those with incompatible Macs and incompatible software -- who likely stuck with Mac OS X 10.6 Snow Leopard -- and did not upgrade to OS X Lion, there is unlikely to be a reason to upgrade to OS X Mountain Lion, either. Based on e-mail received, these users are likely to stay with Snow Leopard for as long as possible.

Ultimately, only you can determine if you are a member of the upgrade now, upgrade later, or upgrade never groups, but evaluating objective pros and cons can help.

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Os x mountain lion 10.8.4

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In theory, you should have to install Mountain Lion only once, or never if your Mac came with Mountain Lion preinstalled. And in a perfect world, that would be the case. But you might find occasions when you have to install/reinstall it, such as

  • If you get a Mac that didn’t come with OS X Mountain Lion preinstalled

  • If you have a catastrophic hard-drive crash that requires you to initialize (format) or replace your boot drive

  • If you buy an external hard drive and want it to be capable of being your Mac’s startup disk (that is, a bootable disk)

  • If you replace your internal hard drive with a larger, faster, or solid state drive

  • If any essential OS X files become damaged or corrupted, or are deleted or renamed

The following instructions do double duty: They’re what you do to install OS X for the first time on a Mac, and they’re also what you do if something really bad happens to the copy of OS X that you boot your Mac from. The instructions offered here describe both the process for installing and the process for reinstalling OS X.

Apple Os X Mountain Lion Wallpaper

Here’s how to install (or reinstall) OS X, step by step:

Os X Mountain Lion Download

  1. Boot from your Recovery HD partition by restarting your Mac while holding down the cmd+R keys.

    The OS X Utilities window appears. Select Reinstall OS X, and click Continue. The OS X Mountain Lion splash screen appears. Click Continue.

    A sheet appears informing you that your computer’s eligibility needs to be verified by Apple. Click Continue to begin the process of installing or reinstalling OS X.

    If you’re not connected to the Internet, you’ll be asked to choose a Wi-Fi network from the AirPort menu in the top-right corner.

  2. The Mountain Lion software license agreement screen appears. Read it and click Agree.

    A sheet drops down, asking whether you agree to the terms of the license agreement. Yes, you did just click Agree; this time you’re being asked to confirm that you indeed clicked the Agree button.

    If you don’t click Agree you can’t go any farther, so I advise you to click Agree now.

  3. Choose the disk on which you want to reinstall OS X by clicking its icon once in the pane where you select a disk.

    Autocad free download full versioncleangoodsite. If only one suitable disk is available you won’t have to choose; it will be selected for you automatically.

    Click the Install button.

  4. A sheet asks for your Apple ID and password. Type them in the appropriate fields; click Sign In, and your Mountain Lion installation (or reinstallation) begins.

    The operating system takes 30 to 60 minutes to install, so now might be a good time to take a coffee break. When the install is finished, your Mac restarts itself. If you were reinstalling OS X on a hard disk that it had been installed on previously, you’re done.

    Your Mac will reboot and you can begin using your new, freshly installed (and ideally trouble-free) copy of OS X Mountain Lion.

    If you’re installing Mountain Lion on a hard disk for the first time, however, you still have one last step to complete. After your Mac reboots, the Setup Assistant window appears. You need to work your way through the Setup Assistant’s screens.