How to make pictures look normal in Windows by using LR2 under Mac.

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I am using LR2 on my MacBook to make my pictures look better, and all pictures are token by a Canon 4''D with sRGB.
Today, when I finished my job, everything looked perfect, so I exported some selected pictures to JPG format (sRGB color space). Then I started my Windows XP on the SAME computer, and those pictures looked very light, "flat" or "zeroed".
Same computer, same files, totally different look, WHY?
99% of my friend and my print shop use PC, how can I do to make them see same pictures I saw on my Mac?
Thank you very much for any help.
 
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There are 2 things that could be going on...

1. You're actually exporting to a larger colour space, i.e. ProPhoto RGB and Windows Picture Viewer is not colour managed, so it will look weird.

2. How are you calibrating your monitor - and how are they calibrating their monitors?

3. If you look at the exported images in another program on your Mac, for example Preview, do they look like LR or like the PC version? If they don't match, your monitor profile is probably corrupted.

And while we're at it, if you're still using 2.' as per your signature, it's worth updating to 2.3 as there were some big bugs fixed in between.
 
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1. I select sRGB on my 4''D, and export pictures to sRGB as well.
I just checked the info of the images on my Mac, all exported JPG files are descried as sRGB IEC61966-2.1, but all the RAW (CR2) files are in Adobe RGB (1998).
So I checked my 4''D again, it's definitely in sRGB.
I just don't understand what is happening.
2. There is only one monitor--my MacBook 13 inch's LCD. The Mac system is 1'.5.7 and the Windows system is XP Sp2. All the monitor settings are just as default in both systems.
3. All the exported images look well in Mac OS, both in preview or safari (if be uploaded). However in firefox for mac it just look like the PC version.
In Windows images look weird in Picture Viewer an IE.
I am using LR 2.2 now, but I am going to update it ASAP.

Thanks again.
 
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CR2 files are RAW they don't have a colour space so don't worry about that. The Adobe 1998 colour space you see is probably the colour space of the embedded jpg in the RAW file. LR has it's own wide gamut colour space (called Melissa) so you have to define the colour space you want when you export (which you have done correctly)

The software driver for the Video Card will be different in Mac OS and Windows XP so this is the most likely issue. Do you calibrate your screen ? You will have to do this in OSX and XP if you want it to match.

The default settings in the drivers for each OS will be different and as Apple supply the hardware and the software they are much more likely to match. It's likely that the XP driver is the one that is out by the furthest.

If your exporting the images with an icc profile embedded you shouldn't see much of a difference on the 2 systems once the monitor / video card have been calibrated / adjusted correctly.

If you don't export with a profile then this can change things a bit. Most Operating systems and applications assume sRGB if no profile is present. OSX is different and actually assigns the monitor profile (much to the annoyance of most professional image users and one day Apple MIGHT FIX THIS!!!)
 
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Victoria Bampton and sizzlingbadger, thank you very much.
I have to see I don' t really want correct colors.
I edit images on Mac, my friends views them on PCs with uncalibrated monitors.
What should I do to make them see pictures without too big difference except switching to PC.
 
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Calibrate your monitor. Simple as that.

Calibrate to a standard - usually gamma 2.2 white point 65''k (or native for LCD screens)
 
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Or if they're viewing through a browser make sure they have colour management enabled - Safari has this on by default, Firefox needs it turning on manually I think.
 
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Thank you. I will do that.
And on more question:
SHould I use Adobe RGB or sRGB on my camera, since I will export images to sRGB format anyway.
 
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If you're shooting raw, the camera profile is only affecting the embedded preview - and the on camera histogram and clipping warnings, if you make use of those.
 
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99.999% of people looking at images on the internet don't have a calibrated monitor. They are used to what they see though so if you want your images to look the same as other professional (ie calibrated) images you will have to calibrate your monitor.

Calibrating is easy and fairly cheap so don't be put off by it. If you spend time adjusting your images in Lightroom or any other application then remember this... you are wasting every minute sat in front of that computer if you haven't calibrated. You are adjusting your images so they look good on your monitor, you might as well be wearing yellow sunglasses while you do it.
 
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Also... check if there any manufacturers drivers available for the video card, often Windows will use a generic driver hat will not be as good.
 
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