Yes, OS X Mountain Lion, the long awaited update to the OS X operating system platform, is now readily available over at the App Store for $20, but is everything hunky dory? Not really, as some users have already reported running into trouble when downloading this particular installer onto their Mac after purchase. There are a few errors recorded, including “This item is temporarily unavailable. Please try again.”, to the ever annoying Error 100 message which is pretty vague in its description, mentioning “We could not complete your App Store request. An unknown error occurred (100).”
Fret not – these errors can definitely be fixed, taking just a few minutes of your life to rectify before everything ends up as plain sailing again. The easy way would be to quit the App Store by signing out of it, restart your Mac and login to the App Store before making another download attempt, but if this does not work, there is a more advanced way of going about it.
This time round, not only do you need to quit the App Store as mentioned above, but you will also need to delete prior “Install OS X Mountain Lion” installers – something developers would have on their machines, or those who have already tested OS X Mountain Lion prior to its release. Following that, empty the trash (force empty it if you need to) and resume the downloading process. Which method worked for you if you were affected?