"""Physical system memory as a (total, used, free) tuple."""
total = _psutil_osx.get_total_phymem()
free = _psutil_osx.get_avail_phymem()
used = total - free
percent = usage_percent(used, total, _round=1)
return ntuple_sysmeminfo(total, used, free, percent)
"Return the amount of physical memory currently in use on the system, in bytes."
return TOTAL_PHYMEM - _psutil_osx.get_avail_phymem()
"Return the amount of physical memory available on the system, in bytes."