Umbrella is a great anti-duplication tool that reports duplicates at the time they are created.
Prevention is better than cure.:
Umbrella reports duplicates at the time of their creation. Now you do not need to spend time on work with a huge amount of results when using the standard duplication tool. Umbrella is the only anti-duplication tool available on the market. It is unobtrusive, easy to use and powerful. Umbrella is the perfect complement to Tidy Up 5, and together they will keep your Mac clean and efficient.
- Search in iTunes database.
- Search Photos image files.
- Search by files.
- Customize criteria to determine the duplicates.
- Automatic mark for a fast removal.
- Multiple files preview.
- Full integration with Tidy Up 5
- And many more.
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Requirements: OS X 10.14 or later 64-bit