You ask for a lot for your budget

You want to boot Mac OSX, you need to know how to get over the "white list" by Apple.
Sure fire way to be able to boot all the OSes listed is to get a Mac:
15"
MacBookPro 15", i7-3610QM + Nvidia GT650M + (1440x900)@RM5499[2.56kg], 4GB, 500GB(5400rpm), backlit keyboard, Mac OSX

Don't bother about free gifts lah Cheap stuff, poor quality ...
Warranty, all the brands allow you to extend warranty. You just have to pay more.
Scratch? Get protective film.
Cool design? Only you could determine that
loud and nice speakers? All laptop speakers suck
Wifi chipset? Some Dell models let you customise wifi card. Other brands in Malaysia? Take it or leave it. Check on the display model to see it has the chipset you like.

I am just going to list few 14" with GT640M GPU (please note this is a lot less powerful than GT640 in desktop) that is close to your budget:

Dell
Inspiron 14R (Special Edition), i5-3210M + Nvidia GT640M(28nm Kepler)@RM2049[2.38kg], 4GB, 500GB(7200rpm), W7HP/W8
Lenovo
Z480, i5-3210M + Nvidia GT640M@RM2299, 4GB, 1TB(5400rpm) W7HB, colors: grey/red/blue

This post has been edited by nexus2238: Jan 14 2013, 10:19 AM

The reseller you asked could be BSing you
Y580 is not EOL, Y480 is. The cheapest RM2999 RSP spec Y580 is getting less stocks in the market but Lenovo Malaysia is still selling it. The RM3499 RSP spec still has stocks.
Maybe you should ask other shops
If really can't find Y580 in Perak, go for Y400 then

This post has been edited by nexus2238: Jan 14 2013, 10:50 PM

Do you prefer something around 11" or 14"?

The recommended models satisfy your usage
With your budget, not many choice for 3rd gen (ivy bridge) i3 Most are 2nd gen (sandy bridge).

Closest:
Acer
E1-471-32322G50L, i3-2328M + Intel HD3000@RM1299, 2GB, 500GB, Linux

Asus
X44H-VX280, i3-2350M + Intel HD3000@RM1399[2.44kg], 2GB, 500GB, FreeDOS; 1 year warranty

Dell
Inspiron 14, i3-3110M + Intel HD4000@RM1399[2.1kg], 2GB, 500GB(5400rpm), W8

Fujitsu
LH531-MYE0100348, i3-2350M + Intel HD 3000@RM1299, color: red, freeDOS

HP
1000-1201TX, i3-2328M + Intel HD3000@RM1299, 2GB, 500GB, freeDOS, no USB3.0, AMD HD7450M@RM1499

Lenovo
G480, i3-2328M + Intel HD3000@RM1299, 2GB, 500GB (5400rpm), FreeDOS

The Dell is the best deal since it's ivy bridge i3 and come with W8.

Please see suggestion for ahchat above

Ask owners here
http://forum.lowyat.net/topic/2619081

Budget? Screen size?
Does your sis play games? That's what (Nvidia) GPU is for.

Since you didn't specify screen size:
14"

Asus
A45VS-VX026H, i5-3210M + Nvidia GT645M@RM2199[2.4kg], 2GB, 500GB, W8

HP
Pavilion G4-2205/2206/2207TX, i5-3210M + AMD HD7670M@RM2099[2.19kg], 2GB ,500GB(5400rpm), W8, colors: white/red/black

Lenovo
Z480, i5-3210M + Nvidia GT640M@RM2299, 4GB, 1TB(5400rpm) W7HB, colors: grey/red/blue
G480, i5-3210M + Nvidia GT635M@RM1899, 4GB, 1TB (5400rpm), W8, 2 yrs warranty

Z480, i5-3210M + Nvidia GT640M@RM2299, 4GB, 1TB(5400rpm) W7HB, colors: grey/red/blue
Inspiron 14R (Special Edition), i5-3210M + Nvidia GT640M(28nm Kepler)@RM2049[2.38kg], 4GB, 500GB(7200rpm), W7HP/W8

1. "sucks" - in what way? The 2 models has decent build quality Btw, if you are willing to pay, Acer don't suck
2. Reputation - Each brand has "good" reputation somewhere somehow Dell & Lenovo has good warranty support.
3. "quality" - see 1.

You don't need 2GB VRAM GPU for your budget. It's a marketing gimmick. The GPU within your budget range don't have sufficient power to generate data to use the 2G VRAM.

Dell has better standard warranty (on site). Lenovo has longer warranty period (2 year).
Lenovo Z is more colourful.

Your sis don't need Nvidia GPU to watch show Intel IGPU can handle all the videos out there
She need Nvidia GPU if she play some graphic intensive game. If she is into FB game, flash game, ... she don't need Nvidia GPU.
Fast - looking at your sis usage, I suspect her "fast" is really not concerning CPU / GPU, she really need a SSD
No HP, Dell, Acer. 14".

Asus
K46CM-WX090H, i5-3317U + Nvidia GT635M@RM2199[2kg], 2GB, 500GB, W8, OD

Lenovo
S400, i5-3317U + Intel HD4000 + 24GB mSATA + 500GB(5400rpm)@RM1999[1.8kg], 4GB, W7HB; AMD HD7450M/W8@RM2199

Price is RSP, negotiable. Use remaining budget to upgrade RAM (4G stick ~ RM80), upgrade HDD to SSD (128G ~ RM250+, 256G ~ RM550+).
Then she will have a light, "fast", laptop.

Dell Malaysia has the best warranty support service for laptop in Malaysia. Supposed you spend extra RM200++ to extend the warranty to 3 years, what you will get is: Any time your Dell laptop has a hardware problem, you just need to call Dell, their operator will diagnose the problem, and if needed, a technician will be sent to your home to fix the laptop for your on the spot on the next business day. You never need to personally send your laptop to a service centre.

The Lenovo Z480 is a good laptop as well. Btw, just in case you don't know, actually Lenovo Malaysia also offer on site warranty support service, but you have to specifically ask for it to upgrade since it don't come standard.

Don't worry too much about HDD capacity. Price between 750G and 1TB HDD is so minor now, you can easily get the re-seller to give you a free upgrade

This post has been edited by nexus2238: Jan 15 2013, 10:24 PM

The closest Dell to that K46CM are these:
Inspiron 14R, i5-3317U + Nvidia GT640M LE@RM2099[1.97kg], 4GB, 750GB(5400rpm), W8SL
Inspiron 14z, i5-3317U + AMD HD7570M + 32GB SSD + 500GB(5400rpm)@RM2449[1.87kg], 4GB, W8 *no VGA port, OD

If you must choose, go with i7 quad core + mid-end GPU.
But why not have the best of both world?

Lenovo
Ideapad Y580, i7-3630QM + Nvidia GTX660M + 1920x1080 @RM2999[JBL], 4GB, 500GB(5400rpm), W7HB/W8, backlit keyboard, 2 yrs warranty (Stock limited)
Ideapad Y580, i7-3610QM + Nvidia GTX660M (2GB) + (1920x1080) + Bluray@RM3499[JBL], 8GB, 1TB HDD(7200rpm), W7HP, backlit keyboard, 2 years international warranty

Price is RSP, negotiable.
FHD screen give you the work space. HDD can be upgraded with the reseller if required (500G to 1 TB < RM100).
8G RAM should be sufficient, but it also depends on how big the files, how extensive the effects the user is dealing with (2 x 8G sticks ~ RM400+, just make sure the OS installed can utilise it).
Make sure the user has good external cooling solution, since Y580 could run a bit warm

This post has been edited by nexus2238: Jan 16 2013, 01:26 PM

Was that a Acer laptop?

For After Effect, CPU+RAM > GPU. That's why i7 quad core is good If the Acer is using i5-2xxxM, then you are looking at ~ 40-50% more CPU power. After Effect can make use of every core.

As I mentioned, since the user is going to use it for extensive rendering, please get GOOD external cooling solution for Y580.

This post has been edited by nexus2238: Jan 16 2013, 01:45 PM

Is mobility absolutely important for the user? If not, you could get a more powerful desktop to do all the rendering (i7 desktop blow i7 laptop away), and can get a cheaper laptop to do presentation ....

Y580 is heavy, with the brick and everything, it's about 3.0+ kg

This post has been edited by nexus2238: Jan 16 2013, 02:11 PM

Are you guys running a torture house or something?
Yea, some of the old laptops have amazing built quality

I don't think T14 is in Malaysia yet
But I remember T14 spec is just i3/5/7-3xxxU with Intel HD4000, HDD, ODD.

Look at these to see if they strike your fancy:

Acer
M5-481TG-53316G12, i5-3317U + Nvidia GT640M LE (28nm Kepler) + 128GB SSD@RM2899[1.85kg], 6GB, W7HP
M5-481PTG-53316G52, i5-3317U + Nvidia GT640M + 20GB mSATA + 500GB HDD@RM2999, 10-point touch, W8

Asus
K46CM-WX090H, i5-3317U + Nvidia GT635M@RM2199[2kg], 2GB, 500GB, W8, OD

Dell
Inspiron 14z, i5-3317U + AMD HD7570M + 32GB SSD + 500GB(5400rpm)@RM2449[1.87kg], 4GB, W8 *no VGA port, OD

HP
Envy4-1111TX, i5-3317U + AMD HD7670M + [32GB mSATA + 500GB(5400rpm)]@RM2599[Beats][1.75kg], 4GB, W8

Samsung
NP530U4C, i5-3317U + Nvidia GT620M + 24GB mSATA + 1TB HDD@RM2999[1.81kg], 6GB, ODD, W8

Those 2 models are your best bet within your budget
Get RAM, get SSD, (for Dell) extend warranty for the remaining of your budget.
Unless you up your budget to go
Y400, i7-3630QM + Nvidia GT650M@RM2799, 4GB, 500GB, W8, 120wPSU, swappable ODD

This post has been edited by nexus2238: Jan 16 2013, 02:38 PM

Y580 is 15" (not 14"). Heavy. Total overkill for light gaming
Worth to buy? If you are looking for the best gaming laptop money can buy in Malaysia under RM3k, YES YES YES

Y580 don't have the wifi issue as in U series (which allegedly has been solved btw, but I can't verify ).
Nevertheless, the Y580 in Malaysia is getting the Broadcom wireless chipset, and the wireless performance is not the most ideal