First you download the file, in zip form, Do Not UN-ZIP the file then open finder, go to "your name" and find "library", after that find the folder labeled "application support", inside that scroll through until you find the folder "minecraft" after that go into that folder and look for the folder labeled "texturepacks" drag the zip file into there and done! Open your game and select mods and texturepacks and choose the newley installed texturepack
you get a .zip of the texture pack, and copy it into the texture packs folder in the minecraft directory
Eat your mac
When you downloaded the texture pack, it should be in a zip file. You have to put the .zip file into the %appdata%>.minecraft>texture packs if you are a mac user: Your Mac id>Library>application support>minecraft>texture packs. Do not use the Library in the macintosh HD Drive. Then you open up minecraft, then you go into texture packs and mods. Then choose the texture pack, then say ok, then play minecraft :)
On mac, download the .zip then put it in your texture pack folder. (Install mcpatcher if needed)
Okay, so first off go to the little pop-out window on the bottom left of your screen and go to search. (or run) Type in %appdata% then, open the folder Roaming, then minecraft. Go to texturepacks, make sure your texture pack is unarchived', place it in and run minecraft. Enjoy! (certain texture packs may require MCPatcher, it will usually state it on the texture pack download website.)
To install minecraft tardim time and relative dimension map on mac, you need to run their software on Mac.
In 1.7.4,User Library folder/ Application Support/ minecraft/ resoucepacks folder-- take out the texture pack you don't want anymore. It will then use the default textures when you start up next.
To install MCEdito on your Minecraft Mac OSX you have to download the program from the appropriate website and then follow the instructions on your screen.
The same as a pc install it go to run do %appdata%/.minecraft/bin hazzah!
Any that are formatted for the version of Minecraft that you have.
There are a few reasons this could have happened. First of all, you need to make sure it is an SD texture back. (16x16) If it is any higher than this, you have an HD texture pack, and unless you patch your minecraft, there is no way you are going to use an HD texture pack. What you need to do is download a program called MC Patcher. I'll have the link on the bottom. You need to make sure you have a fresh minecraft.jar and bin. To do this you will have to delete your .minecraft folder and then run minecraft. If you want to save the levels you are working on go to/roaming/.minecraft/saves if you are on a PC. For mac it is Library/ApplicationSupport/minecraft/saves. Drag the saves onto your desktop or wherever before you delete the .minecraft and replace it after. Then open MC Patcher and click the patch button at the bottom and drag your texture pack (make sure it ends in .zip) into your texture packs folder. It should work fine if on a PC. If you are on a mac you may experience different results. I hope this worked, if it did not, i'm sorry I couldn't answer your question.
You should use forge.