Is the version of OS X on the USB older than the OS X version on the internal disk?
sudo dd if=/dev/rdisk0s2 count=5 2>/dev/null | hexdump -C
Password:
00000000 21 cc 18 45 ff ff ff ff 01 00 10 00 00 00 c9 01 |!..E............|
00000010 07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00000020 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00000030 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00000040 00 40 5c d9 1d 00 00 00 00 00 00 00 00 00 00 00 |.@\.............|
00000050 00 00 00 00 00 00 00 00 43 53 01 00 00 00 04 00 |........CS......|
00000060 00 10 00 00 00 00 40 00 c3 85 dd 01 00 00 00 00 |......@.........|
00000070 c3 89 dd 01 00 00 00 00 c3 8d dd 01 00 00 00 00 |................|
00000080 c3 91 dd 01 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00000090 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
000000a0 00 00 00 00 00 00 00 00 10 00 00 00 02 00 00 00 |................|
000000b0 96 f5 bd 13 e7 18 ac 0d 3e 1e f6 a0 ba 3b e9 8b |........>....;..|
000000c0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
00000130 4d 89 70 85 07 93 48 cc a0 0f 58 57 2a 56 b0 43 |M.p...H...XW*V.C|
00000140 57 57 83 57 37 15 48 a5 ab 8a 41 07 af 12 f7 fb |WW.W7.H...A.....|
00000150 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
00000400 48 2b 00 04 80 00 20 00 48 46 53 4a 00 00 07 73 |H+.... .HFSJ...s|
00000410 d0 19 10 0b d2 c8 59 47 00 00 00 00 d0 19 48 4b |......YG......HK|
00000420 00 1a 72 53 00 03 ab 0a 00 00 10 00 01 d6 f7 3c |..rS...........<|
00000430 00 33 14 84 00 3b 19 50 00 01 00 00 00 01 00 00 |.3...;.P........|
00000440 01 26 52 59 31 34 f5 d0 00 00 00 00 02 20 00 fb |.&RY14....... ..|
00000450 00 a8 8c f7 01 22 7a b9 00 00 00 00 00 00 00 00 |....."z.........|
00000460 00 00 00 00 00 a8 8c f7 95 de 25 c1 1c 2c 50 56 |..........%..,PV|
00000470 00 00 00 00 00 77 20 00 00 77 20 00 00 00 07 72 |.....w ..w ....r|
00000480 00 00 00 01 00 00 07 72 00 00 00 00 00 00 00 00 |.......r........|
00000490 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
000004c0 00 00 00 00 00 80 00 00 00 80 00 00 00 00 08 00 |................|
000004d0 00 00 1f 74 00 00 08 00 00 00 00 00 00 00 00 00 |...t............|
000004e0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
00000510 00 00 00 00 53 40 00 00 06 f0 00 00 00 05 34 00 |....S@........4.|
00000520 00 06 78 74 00 05 34 00 00 00 00 00 00 00 00 00 |..xt..4.........|
00000530 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
00000560 00 00 00 00 37 20 00 00 09 30 00 00 00 03 72 00 |....7 ...0....r.|
00000570 00 00 27 74 00 03 72 00 00 00 00 00 00 00 00 00 |..'t..r.........|
00000580 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
00000a00