- Reinstall mac os x lion 10.7 mac os x#
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To optimize your Mac, it is quite necessary to reinstall and start from a clean slate.
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Here are couple of reasons we can think of: One, your existing Mac OS X inherited documents, files and applications that take up a lot of unnecessary storage space.
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But first, why should you clean install the Mac OS X Mountain Lion at all? Unfortunately in Mac the process can be a little more complicated and less well known. We’ll see what they do, but one thing is for sure - it won’t be what it has been for the last two decades.In the Windows’ analogy, this is like reformatting your Macbook or iMac and reinstalling a brand new version of Mac OS X Mountain Lion. There needs to be some way to install Lion on a bare, unformatted drive, and the flash keys included with the Airs seem to be just the ticket. This is what they currently do with the MacBook Air models, and it works really well. My guess is, Apple will most likely eventually include a bootable flash drive with all Macs, out of the box. The solution detailed above is admittedly quite nerdy, and not something normal people will be likely to attempt. How will normal people install to a bare drive? Just skip the GUID partitioning bit and you’ll be good to go. If you don’t have or want to use a flash drive or USB hard drive, this procedure also works with a blank DVD. This lets you install Lion without even connecting to the Internet, or checking with Apple first, because the disk image was restored from a pre-downloaded copy of Lion already purchased and authorized on the Mac App Store. Then click “Restore.” This will create a bootable Lion installer in about 10-15 minutes, which will contain all of Lion, not just that wimpy “Recovery” mode, from which you can perform a complete install.
Finally, choose the “Restore” tab, dragging your “InstallESD.dmg” from the sidebar to the “Source” box, and the flash drive partition to the “Destination” box. Then, partition the drive (one partition is fine, but you must partition to get access to the advanced options) using the GUID partition table. Just drag that disk image into the sidebar of Disk Utility, and insert a USB flash drive or hard drive.
Just right click that icon and choose “Show in Finder.” From there, right click the icon and choose “Show Package Contents.” Inside the installation package you’ll find an “InstallESD.dmg” disk image. When you purchase Lion, it places an “Install Lion” icon in your dock. The good news is there is a workaround, and a fairly easy one at that. Thirdly, if your hard drive actually fails, so will your recovery partition, leaving you stranded. Apple is now presumably tracking who has Lion on their Apple account, and denying you access if you haven’t paid for it on that account. Second, this marks the first time Apple is doing device activations on Macs. First, if you don’t have a very fast Internet connection available, you’re basically screwed.
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If you click OK, Lion then attempts to connect to Apple and download all 4+ GB of Lion from Apple’s servers.
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If you opt to do a re-install, Lion warns you that your Mac’s serial number will be sent to Apple. The recovery partition only contains a very limited base system that lets you use Safari to get help online, use Disk Utility, or do perform re-install.
Lion phones homeįirstly, Lion isn’t really there. Apple has done a few weird things with Lion to make it a “cloud” friendly OS, and some of them are not necessarily good things. This is where things get interesting (read: sticky).
You simply mouse or arrow-key over to that partition and press return, which boots you into recovery mode. This brings up a list of partitions available for you to boot from, one of which is the new “Mac OS X Recovery” partition created by Lion when it’s originally installed. To recover a Lion installation, and do a clean install or reinstall, you simply reboot while holding the option key.
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