Apple has switched to the 2.2 Gamma.  Don't know when though, probably the
10.5 or 10.6 era.

On Fri, Feb 26, 2010 at 9:01 AM, matt <maht-9fans@maht0x0r.net> wrote:

>
>  i don't know.  it's not libfreetype.  fontsrv asks the OS X
>>> graphics code to render each glyph into a box and then
>>> concatenates the boxes to make the subfont.
>>> all the text was noticeably lighter (more grey)
>>> than in your screen shot when i put them side by side.
>>>
>>>
>>
>> this is due to apple's algorithm for rendering glyphs.
>>
>>  I don't know if it is relevant but OSX uses a 1.8 Gamma whereas PC's (&
> TVs) use 2.2
>
>