Is there any software that currently works for reading CoreStorage-formatted harddrives while booted into Windows, specifically 8.1? I've tried Paragon HFS and MacDrive, but even the latest versions, they only seem to support HFS+, which, if I understand correctly, is not just some new Apple buzzword for "HFS+" but actually some sort of new system altogether. I've done some Googling for this already and nothing has turned up, so I'm guessing there's no solution right now (except to reformat the Mac partition as HFS+, which I'm not going to do). I'm surprised that even so long after CoreStorage's introduction there still aren't any Windows-compatible drivers though. It's odd because MacDrive claims to support CoreStorage in a recent (February) update, http://www.mediafour.com/macdrive-9-3-2-6-standard-and-pro-are-now-available/ but I don't see anything to show up at all. My drive is not encrypted. Anyway, in case anyone knows more, let me and whoever finds this thread by Googling "CoreStorage Paragon Windows 8.1 Yosemite" in the future know. Edit: For anyone who really needs this feature in Yosemite, you can revert your drive back from CoreStorage to HFS+, following these instructions here: http://awesometoast.com/yosemite-core-storage-and-partition-woes/. I don't need it badly enough to revert to a deprecated file system, so I guess I'll wait another 6 months and see if anything has changed.