Mods are completely community made, and Mojang does not guarantee their quality.
It depends on the mod it's self, you can "modify" any version of Minecraft on any OS, it simply depends on whether the actual modifications made support specified OS.
That is something you'll have to ask the mod author about, but in most cases unless the mod is dependent on the actual OS, it should make no difference on what OS you are running.
Mods are completely community made, and Mojang does not guarantee their quality.
It depends on the mod it's self, you can "modify" any version of Minecraft on any OS, it simply depends on whether the actual modifications made support specified OS.
That is something you'll have to ask the mod author about, but in most cases unless the mod is dependent on the actual OS, it should make no difference on what OS you are running.