I made presets in AE СС2014 in Windows. I sent them to a friend. He have AE CS5 and Mac OS. He place them to Applications/Adobe After Effects CS5/Presets and to Documents/Adobe/After Effects CC.
Reload AE and did not see the presets in the panel Effects&Presets->Animation Presets->Presets... or in Effects&Presets->Animation Presets->User Presets...
Is it impossible to open the presets in earlier versions? And if on the Mac OS will be installed СС2014 everything will be okay?
The operating system is not likely to be the issue. The likely issue is that he's using a very old version compared to yours.
Animation presets are not backwards-compatible. You can't use an animation preset created with a new version of After Effects in an old version of After Effects.