Note that you can't set a blocksize of 1 with df on OS X at all:
$ BLOCKSIZE=1 df /tmp df: minimum blocksize is 512 df: minimum blocksize is 512 Filesystem 512-blocks Used Available Capacity Mounted on /dev/disk1 974803248 289149696 685141552 30% /
Note that you can't set a blocksize of 1 with df on OS X at all:
$ BLOCKSIZE=1 df /tmp
df: minimum blocksize is 512
df: minimum blocksize is 512
Filesystem 512-blocks Used Available Capacity Mounted on
/dev/disk1 974803248 289149696 685141552 30% /