Hey,I need to have Windows available, so I decided to install Windows 7 on my Mac. I recently upgraded to macOS 10.12 Sierra Public Beta (currently, I have PB 2), but I don't think that the problem is here because of the beta OS (I had the same issue few years ago on production version of OS).I tried to run Boot Camp Assistant, but when I click Continue, message with text "Not enough space on startup disk to repartition. You must have at least 50GB of free space." (I have macOS in Czech, so I translated it), which is weird. I have 63GB free and I have SSD (128GB), so there shouldn't be any problem with fragmentation.Can you help me with this? I tried everything, including disk repair in recovery mode.