GarageBand is not part of Yosemite.
As GarageBand is developed by Apple, you are not going to find a version for PC/Windows. There are some websites around that “promise” to make this dream a reality but we would advise staying well away from them for security reasons. FxFactory 4.1.9. Last version to support OS X Lion, OS X Mountain Lion, After Effects CS5 and CS5.5, Final Cut Pro 7 and Motion 4. This version improves support for OS X Yosemite and brings better performance when stacking multiple Nodes 2 effects in the same timeline.
How did you reinstall Yosemite? If you restored your Mac from a Time Machine backup, you should have restored the same version as before.
Perhaps you have set your System Preferences > App Store to allow automatic application updates? The most recent Garageband update is GarageBand 10.1, released at the end of June.
The previous major version of GarageBand is GarageBand '11, version 6.0.5. This version is part of the iLife '11 package and very different from the newer GarageBand 10.0. Apple does not sell this version any longer. New Macs come only with GarageBand 10.0.
Can I Get An Older Version Of Garageband
If you previously owned GarageBand '11, you may abe to reinstall it from the Purchases tab of the AppStore. It will show there, if you bought it from the AppStore or bought a Mac with GarageBand '11 preinstalled with MacOS 10.7 or later.
Garageband Ios Version History
Jul 5, 2015 11:14 AM