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Mountain Lion will not only make your Mac work better, it also makes your Mac work even better with your iPhone, iPad, and iPod touch. Just click the Mac App Store icon in your dock, purchase Mountain Lion, and follow the onscreen instructions to install it.
Osx mountain lion install disk download#
Disadvantages: requires an internet connection and new enough firmware since everything is coming over the internet, booting will be slower than with your own recovery drive (and again, reinstalling Lion will require 4GB worth of patience). OS X Mountain Lion is available now as a download from the Mac App Store. Advantages: doesn't require any advance preparation as above, you can boot from this and recover from Time Machine and/or reinstall Lion (if you have enough time).
Osx mountain lion install disk full#
Disadvantages: you must create this before removing the old HD, it requires an 1GB or larger flash drive, and since it won't include the full Lion installer you'll need an internet connection (and 4GB worth of patience) to reinstall Lion with it. Advantages: you can boot from this and recover from Time Machine (and/or reinstall Lion if you have an internet connection and enough time).
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Create your own Lion installer drive (per Diago's answer) using a downloaded Lion installer app.Advantages: you can boot from this and reinstall Lion and/or recover from Time Machine without needing an internet connection. Buy a Lion installer (USB drive) from Apple.There are a number of similar options that can be a little confusing, so here's an attempt at clarifying their differences: Then, after you replace the HD, you can boot from that and use it to reinstall Lion and/or recover your system from Time Machine. But if you have a copy of the Mountain Lion installer you most certainly can put it on a USB flash drive. I'll add yet another option to the list: before you remove the old HD, use the Lion Recovery Disk Assistant to copy its recovery partition to a flash drive. Unless you have downloaded Mountain Lion from the App Store in the past, then you cannot re-download it.