HaloMods "Classic" Read-only Archive

Hi i was uploading one of the warthog skins and i got it to work but the read me said to click "Save Texture" but that option was not on the HMT menu or anywhere else there. Is there an alternative for save texture? Is it called something else? I am using HMT that i downloaded from this forum on a Mac. Please Help.

Thanks in advance..

sry for the dp but i really need this question answered can someone please help me.