I had actually asked this a while ago, but there was a thread some years ago that should answer your question:

https://www.reddit.com/r/AskHistorians/comments/26zlkt/in_ancient_greece_was_there_a_taboo_against/

According to u/CommanderRown there are no extant accounts of Greeks climbing Mount Olympus, but, also, there were two such Olympuses, a physical and divine. The divine, where the gods rested, was not reachable to mortals, though we can see the physical one just well enough.

This isn't really worthy of a top level comment, but that's what I could find searching on Reddit in which the user provides a source.