How to install a texture pack??

Someone know how to install a texture pack , i have a macbook and the name of the program is tlauncher and i dont know

You should download you liked a textue pack then;
Go to your roaming file (if you don't know where is this you can execute Windows + R command then type %appdata%)
Open .minecraft folder.
Open resourcepacks folder or texturepacks folder and drag your downloaded texture pack file then drop there

For further clarification, you put the entire zip folder into the resourcepacks folder - don't unzip the files!

Install one then drag it to your texturepack folder

Go to home screen --> resource packs --> add texture pack and drag the file (zip) into the folder that opens, then you should activate it

From within the game click on resource packs and then there should be a button to open the resource packs directory. Then just pop the .zip archive there.

First go to yout "appdata" folder > "roaming" > ".minecraft"
Inside the .minecraft folder create another one called "texturepacks", paste your texturepack.zip inside, be happy with your new pack

take the ressource pack folder and place it in ressource pack minecraft folders, you can see it when you click on ressource pack option in game

go to ur mc folder go into resources and put inm the texturepack also have optifine or it lags ingame and then choose texture