Attempt to run the .jar version of the launcher.
https://s3.amazonaws.com/MinecraftDownl ... ecraft.jar

No

Have you downloaded anything large in size since the last time it opened?
As far as I know, it could be as harmless as lag, to as serious as a virus.

I don't have a Mac. So I don't know how to fix problems. I'm just listing things that sound like it can help.

i downloaded the mac one and it did worked before now idk what happen.

Did you download the Mac version of Minecraft? Has it opened in the past?

k

I cannot help you with that macs I no like xD

i am trying magic launcher but it does this
*** MagicMinecraftLauncher 1.1.5 ***
LCP: ;/Users/rolandogonzalez31/Library/Application Support/minecraft/bin/minecraft.jar;bin/jinput.jar;bin/lwjgl.jar;bin/lwjgl_util.jar
MainClass: net.minecraft.client.Minecraft
java.lang.ClassNotFoundException: net.minecraft.client.Minecraft
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at magic.launcher.Launcher.main(Unknown Source)

When i click Minecraft it wont open. I turn of my mac and turn it on it still wont open. I delete it still wont work.
Is it my java?

What do you mean by trying everything?

Possible solutions:
-Turn off computer. Turn back on. Try opening it.
-Delete it. Delete your .minecraft folder as well. Re-download Minecraft. (Make sure you download the Mac one.)
-Force update Minecraft