Hi guys so i have been experiencing this bug lately when i downloaded WOTLK 3.3.5. Any idea how to fix it.

Here is the bug: https://prnt.sc/102avki

Im on Macbook Pro
Processor: 1.4 GHz Quad-Core Intel Core i5
Memory: 8 GB 2133 MHz LPDDR3
Graphics: Intel Iris Plus Graphics 645 1536 MB