Note this is not officially supported by the developers, and I give no guarantee that this method won't break with future versions of the app
Here's a quick step-by-step:
1. Download WineBottler from their website, open the DMG file, and move those applications to the Applications folder
2. Download the BRU installer from the website
3. Open WineBottler from your Applications folder
4. Click on the "Advanced" icon at the top menu bar
5. On the "Program Installation" section, click "Select File..." to the right, and open the .exe file you just downloaded
6. (Optional) Check the "Include Wine.app, so the ... " box. This allows you to distribute the .app file to anyone so they can just open and run
7. (Optional) Give a unique identifier for the application, such as uk.co.bulkrenameutility. This will help keep your WINE workspace more tidy in the event you use more WINE applications in the future
8. Click "Install" at the bottom right. Give your file a name and location, and click "Save"
9. A few windows pop up as WINE prepares the installer. Wait patiently
10. Go through the installer. To keep things simple, uncheck the "Install Windows Explorer Extension", and "Install Samples" boxes
11. Uncheck the "Run Bulk Rename Utility" box at the end of the installer
12. In the final window, select the option that contains "Bulk Rename Utility.exe", and click "OK" to finish the installation process
WINE has some quirks here and there, but it works fine once you get started. When you open the application, you'll see a "C:" drive and a "Z:" drive. The "Z:" drive maps right to your Macbook's hard drive, so if you can find it on your Mac, you can find it in this drive
Thanks for following along, and enjoy using this amazing program on Mac!!