Is there a padxorer for Mac? The one I found on this site made by cearp is a dead link.
here is a nice folder i just uploaded for you (but yes putting it here publically so everyone can have it)
all the 3ds tools you will most likely ever need, compiled by myself, for mac. they all work for me on yosemite.
https://mega.co.nz/#F!DkxGgJ7b!RDqDu7_1yeXS5YbnnzFvQA
3dstmd - gives details about tmds
aescbc - decrypts CDN content when you give it the decrypted title key
ctrtool - lets you extract stuff from files, i guess it has more uses too
extdata_tool - gives details about extdata, i think that is it
make_cdn_cia - builds cias from cdn content, very important
makerom - lets you build 3ds, app, cia files
padxorer - xors two inputs for you
rom_tool - lets you trim 3ds roms