Comments on: Why does my Mac show 3.75GB of RAM when I have 4GB of memory installed?

By: lui

lui — Mon, 29 Oct 2012 20:35:15 +0000

the missing 250 mb are used by the internal graphics card, it has nothing to do with the 1000 mb per gb, it is always 1024.

By: Joe

Joe — Fri, 19 Aug 2011 02:15:09 +0000

Notice he said Macbook pro 13″

Take care.

By: Ampliando la memoria tu Mac « Yo, programador

Ampliando la memoria tu Mac « Yo, programador — Sun, 07 Aug 2011 11:17:29 +0000

[...] En uso: es la memoria real que tiene el sistema operativo. Yo tengo 4GB, pero marca menos porque lo que falta es la memoria que usa mi tarjeta gráfica, tal y como explican en este post. [...]

By: John

John — Mon, 13 Dec 2010 02:43:13 +0000

The only problem that i have with this article is that i just checked on my friends macbook pro. Same model and everyting and his activity monitor is showing 4.0gb instead of 3.75gb. Can you explain that?

By: Zach

Zach — Fri, 19 Nov 2010 10:46:28 +0000

I had always assumed this was some discrepency between using 1024^3 bytes per gigabyte vs 1000^3 bytes per gigabyte.

Comes out close for 4.0 GB

4.0 * 1000^3 / 1024^3 = 3.73

But if 8.0GB is showing as 7.75GB then I guess it is the video card because 8.0 * 1000^3 / 1024^3 = 7.45 GB