I have made some .blend files on my Windows machine at work and now when I try to render them with my mac at home they render pink or purple (Not good at colors!).
From here I tried Blender-> File -> External Data -> Automatically pack into .blend but I get the error:
Report: Error Unable to pack file, source path /Program Files/ Blender Foundation/ Blender/2.79/scripts/addons/manuelbastionilab/data/textures/human_female_diffuse.png not found
From here I found that the missing textures should be assigned again. So selected
Blender-> File -> External Data -> Find missing files
and then went to the folder
/Applications/Blender.app/Contents/Resources/2.79/scripts/addons/manuelbastionilab/data/textures/
The issue was solved. Now to avoid this happening again you select select the Blender-> File -> External Data -> Pack all into .blend so the textures will be integrated into the .bled file and don't have to be loaded from original texture folder every time.