I'm currently on 10.10.5 and I want to partition my internal SSD into two, installing a fresh copy of 10.12 on the second partition (while keeping 10.10.5 on the original partition). I want to eventually delete the original partition on the SSD that the mac shipped with (10.10.5), leaving only the second partition of 10.12.
Doing a search, it seems it may not be possible to make a second partition the only partition.
Will Disk Utility allow me to delete the original partition? and will it allocate the full amount of regained space to the new partition?