byteswap.h

// a) As Mac OS X does not have byteswap.h
// needed this for a c util I had used over the years on linux. 
// did not find a solution to stopgap via macports, sadly, but this did the trick

#if HAVE_BYTESWAP_H
#include <byteswap.h>
#else
#define bswap_16(value) \
((((value) & 0xff) << 8) | ((value) >> 8))

#define bswap_32(value) \
(((uint32_t)bswap_16((uint16_t)((value) & 0xffff)) << 16) | \
(uint32_t)bswap_16((uint16_t)((value) >> 16)))

#define bswap_64(value) \
(((uint64_t)bswap_32((uint32_t)((value) & 0xffffffff)) \
<< 32) | \
(uint64_t)bswap_32((uint32_t)((value) >> 32)))
#endif


(b) change this line 357 to
while((c = getopt(argc, argv, "hvi::o::p:k::")) != -1){

@Baekalfen Do you mean it was removed from some of the recent SDK? (Or what is implied by always?)

libkern is generally available on macOS, but I found that it wouldn't work when I was developing this driver: MacVFN

Don't remember if the include was missing, or it was ifdef'ed out