- Close Android File Transfer
- Open Activity Monitor and kill “Android File Transfer Agent”
- Go to where you installed “Android File Transfer.app” (I have it under /Applications)
- Ctrl+click –> “Show package contents”
- Go to Contents/Resources
- Rename “Android File Transfer Agent” to e.g. “Android File Transfer Agent_DISABLED”
- Then go to “/Users/username/Library/Application Support/Google/Android File Transfer” and again rename the Agent app.