How to acquire the additional instruments for preinstalled GarageBand 6.0.5 for a Macbook Air (no iLife DVD included)?
I have a new Macbook Air. It came with the iLife apps preinstalled, including GarageBand 6.0.5, but did not come with any iLife DVD. I cannot use certain instruments (such as "Orchestral Strings") in GarageBand. It gives me an error that says I need to download the 1.2 gb update from the App Store using "Software Update". I try that, and there are "No Updates Available". Back on GarageBand, when I click on the instrument again, it says the Software Instrument Selected is being downloaded, when it is not. Everywhere I research online says, when this kind of problem occurs, it is because the update is only housed on the iLife DVD (nowhere in the appstore - not combined with GarageBand, nor as a separate update). The DVD obviously does not come with Macbook Airs. I have also tried downloading the separate GarageBand 6.0.5 update from Apple, as this helped certain people online, but it gives me an error saying my version of GarageBange must be updated through the App Store. Please help; this is exceedingly frustrating!
GarageBand (Mac) '11, OS X Mountain Lion (10.8.2)