how to enter BIOS?

Download and use this tool. There is no BIOS on an Intel Mac.

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Intel Based Macs are loaded by EFI. there are ways to view the loading of the system and third party software to edit the environment but why?

Those options are not available via EFI.

Glor

That's pretty much standard for all notebooks and most desktops put out by major manufacturers. With the exception of a few highend gaming desktops, the BIOS in most major manufacturers machines allow very limited changes... and generally none related to overclocking. They'll let you set your boot order and generally some other minor settings... but not usually anything related to overclocking. Of course you can overclock your heart out if you build your own machine with an off the shelf motherboard. Overclocking notebooks would generally not be a good idea anyway. Notebooks tend to run very warm to start with and have very limited capacity for cooling. At stock settings they tend to be pushing the thermal envelope.

Some utilities exist to overclock Macs. But the ones that do make no precaution in case the overclocking overheats the processor. I almost had a fire one time because I tried to overclock my Powerbook.

If the speed of your machine isn't sufficient, see my FAQ* on optimizing Macs:

http://www.macmaps.com/Macosxspeed.html

Note: most software give you both minimum and suggested specs if they require a certain processing power. Try to buy software which meets your machine's suggested specs, and not minimum specs.

- * Links to my pages may give me compensation.

AceNeerav wrote:
hello everybody, thanks for your replies. certainly i dont plan to overclock my macbook. i am very happy with the speed it gives me, both, on leopard as well as xp. i just have a curious nature and like to explore things.

from your replies what i am curious now as a programmer is that when there is no bios, when the power button is pressed, what initiates the process of boot? like starting the processor, running the POST, starting the HDD, loading the os in ram and finally, handing over the controls to the OS?

this question intrigues me especially since macs can also run windows, which AFAIK do require a bios to be invoked.

I thought a lot of newer Windows machines use EFI. For older operating systems, they're supposed to communicate using a compatibility support module (CSM) to convert for BIOS compatibility. Boot Camp is supposed to do this. Apparently the first Intel Macs using Boot Camp required an EFI update to add the CSM.

Actually EFI is still very rare. In not uncommon form, Apple has adopted the technology far in advance of the mainstream.

I was thinking windows vista 64 bit or xp pro 64 bit supports efi.


glor

How to enter Bios?

Wait for an Apple firmware update... and wait, and wait... 🙂

One advantage to the old Bios is it gives the user choices.

And yes, Vista and the upcoming Windows-7 can use EFI.

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