Update README.md

README.md

@@ -32,7 +32,7 @@ Source(s): [CivitAI](https://civitai.com/models/101055/sd-xl)<br>
 
 **The individual model files in this repo have different bit depths and resolutions which are noted in the file names. The nominal model is 16 bit and 1024x1024. Other versions are reduced bits and/or lower resolution.**
 
-### These are large models and are zipped into smaller parts.  Be sure to download all of the parts for a particular model, and combime the pieces into a single folder on your end.<br>
+### These are large models and are zipped into smaller parts.  Be sure to download all of the parts for a particular model, and combime the pieces into a single folder on your end. The 3 part full size model zip files may not unzip correctly with Apple's native archive tool.  They were made with "BwtterZip".  The 2 part 8 bit model files will unzip with Apple's archive tool<br>
 
 ## Model Description