-
Nagivate to your World of Warcraft > _retail_/_classic_/_classic_era_ folder. The sub-folder depends on what game-client you intend to install the UI for:
- The
_retail_ folder is for the latest WoW expansion (e.g., Shadowlands).
- The
_classic_ folder is for WoW Burning Crusade Classic (BCC).
- The
_classic_era_ folder is for WoW Classic (vanilla).
- (Recommended) Make a copy of your current interface and WTF folders. You can restore your current UI by switching back to them if you ever want to remove MayronUI and revert all changes. Keep these backup copies somewhere else on your computer in a safe place.
-
Download the full MayronUI pack from WoWInterface for the intended WoW game client.
- R = Retail (e.g., Shadowlands).
- C = WoW Classic (vanilla).
- BC = WoW Burning Crusade Classic (BCC).

- (Recommended) Delete all previously installed addons in your
interface > addons folder. This is to avoid conflicts, but if you have addons installed that are not part of the addons listed in the MayronUI pack, then you do not have to delete these.
-
Extract the downloaded ZIP file and move all addon folders into your World of Warcraft > _retail_/_classic_/_classic_era_ > interface > addons folder.
Your addons folder should now look similar to this (note that the below example is for retail, so yours may look different):

Be careful not to merge the downloaded addon folders with ones that previously existed in the targetted addons folder. Ideally, you should start with an empty addons folder unless you know what you are doing. If one of the addons in the UI pack is already installed and you did not follow the recommended step 4, then you risk corrupting your addons.
-
Log in to World of Warcraft but do not enter the world just yet. First, verify that all addons are enabled by clicking on the AddOns menu button in the bottom-left corner of the character selection screen and clicking the Enable All button. Lastly, make sure the Load out of date AddOns checkbox is checked to ensure a safe install, as shown below:

-
Enter the world with any character you wish and press the INSTALL (or CUSTOM INSTALL) tab on the setup menu and then press the final install button.

The custom install tab allows you to re-inject the default settings for individual addons included in the MayronUI pack. For example, if you mess up the settings of Shadowed Unit Frames or Bartender and wish to revert back to the default MayronUI setup then type /mui install, go to the custom install tab, and re-check that addon in the AddOn Settings to Override box, and press the Install button again.

- Make sure to keep each addon included in this UI pack up to date using a program such as WowUp or the new CurseForge client (which replaced the Mods feature on the Twitch app).