The issues preventing MapleStory from installing and updating have now been resolved. Due to changes with how MapleStory files are organized, we recommend performing a full reinstall in lieu of patching. Additional information on reinstalling can be found here: https://maplestory.nexon.net/news/74814
The MapleStory team is currently investigating issues players may experience with installing or patching the game client to the latest update. This includes error messages for installation, downloading files and accessing the server.
If you encounter an error installing or updating the game, please try again after a short while. Additional information will be posted in this article when available. We greatly appreciate your patience!