How to make a Nether portal on Minecraft?

I'm been trying to make one for the past 20 minutes. I know I have to make a 5 by 4 block thing with obsidian and then touch the inside with the flint and stone, but it doesn't work.

Macbook pro 15 or alienware 17?

I want to buy a new computer
should i get alienware 17 or
macbook pro 15

i tend to use this for
adobe apps
minecraft and some light gaming
video editing maybe
entertainment

i got a windows desktop at home its pretty good its also a hackintosh

i7 5820k
16gb ddr4 ram
gtx 980

i don't know i'm confused
i currently own macbook air 13 2013 which sucks

Minecraft Core dumps problem?

I keep trying to download minecraft but each time i load it it crashes with this text
Completely ignored arguments: [--nativeLauncherVersion, 301]
[18:25:11] [Client thread/INFO]: Setting user: HAMANDCHEESE652
[18:25:13] [Client thread/INFO]: LWJGL Version: 2.9.4
[18:25:14] [Client thread/INFO]: Reloading ResourceManager: Default
[18:25:15] [Sound Library Loader/INFO]: Starting up SoundSystem…
[18:25:15] [Thread-5/INFO]: Initializing LWJGL OpenAL
[18:25:15] [Thread-5/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
[18:25:15] [Thread-5/INFO]: OpenAL initialized.
[18:25:16] [Sound Library Loader/INFO]: Sound engine started
[18:25:18] [Client thread/INFO]: Created: 1024x512 textures-atlas
#
# A fatal error has been detected by the Java Runtime Environment:
#
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x47da3ed8, pid=292, tid=3132
#
# JRE version: Java(TM) SE Runtime Environment (8.0_25-b18) (build 1.8.0_25-b18)
# Java VM: Java HotSpot(TM) Client VM (25.25-b02 mixed mode windows-x86 )
# Problematic frame:
# C [ig4dev32.dll+0x3ed8]
#
# Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
#
# An error report file with more information is saved as:
# C:\Users\William\AppData\Roaming\.minecr…
#

AL lib: (EE) alc_cleanup: 1 device not closed

Why does minecraft 1.9 lag so bad for me?

A have a halfway decent computer but a lag bad in Minecraft 1.9. And by bad I mean BAD. Its not just in game though. Its even in the menu. What am i doing wrong? I'm playing with Optifine too!

any suggestions on what i should do?