Yosemite is free, sure, but it is a horrible operating system. Like the other reply, our family downgraded back to Mavericks, which is MUCH better. So, again, if we want to use OneNote, how do we get a version for Mavericks? Also, forcing folks
to upgrade for no apparent reason, or locking in to one version of an OS does not seem very sensible.
What's horrible about Yosemite?
I mainly downgraded to Mavericks because of com.apple.geod process freezing along with other major problems (freezing, stuttering) which makes the OS unreliable. Simplistic design is the only thing I liked about it.
I first had tons of problems when I performed an upgrade from Mavericks to 10.10.0 Yosemite. Then I tried a clean install of 10.10.0, and then also a clean install of 10.10.1. Same problem! I read that 10.10.2 still has this problem.
Apple integrating so many junk to the OSX for their iPhone/iPad users to unify the experience so that they can advertise them. They ran out of ideas, and now all they are adding is piling up buggy software junk to the OS. Yosemite is almost as bad as Windows
Vista. Even at 10.10.2, it's still in beta phase for sure.
I'm really wondering what is so wonderful about Yosemite that MS dropped Mavericks compatibility and made it a requirement to use OneNote.