It's just double zipped. Zips don't support certain characters so it will put the folder, inside another folder, then zip it. You need that second layer or the game won't read anything. I assume that's what happened because that happens a lot.

That's why I always check first :)

this is simple to explain.

when using a mac, a _MACOSX folder is created that invisible to mac users but visible to other operating systems. if you open it up you will see it is a copy of the resource pack's files.

however, this pack has been improperly zipped anyway. i would suggest to the mod author to zip the B A M B O O folder instead of the b-a-m-b-o-o one (you should be able to see the assets, mcmeta file and png directly when you open the zip.)

once properly zipped, it works just fine. hope this helps!

lies