Overwrite existing files

Mac
1

Hello,
I am trying to copy all files without replay gain, so I can process them.
But unfortunately there are duplicate names for different files, so mp3tag will not copy them or overwrite them, because they all go into one folder.
Are there any workarounds? I am on Mac and Footbar does not exist the way it does on windows...
Thank you

EDIT: Actually I was now able to calculate the Replaygain Tags from within Foobar on Mac

2

Depending on how many files you have you could have used something like rsgain to recursively calculate replay gain tags for your entire collection.
There's also an option to only calculate values for files that do not already have replay gain tags. All you need to do is append -S or --skip-existing.