06-03-2026, 10:27 AM
Error 640 unzip problems on Mac usually stem from corrupted ZIP archives, downloading only parts of a file, compression formats which the system is not familiar with, file permission limitations, or macOS Archive Utility malfunction. On top of that, lack of disk space or faults in a file system might also hinder the extracting operation. Here are some steps to fix the Error 640 Mac unzip issues: Firstly, try downloading the ZIP file once more to make sure that it is complete and intact. Verify that there are enough storage spaces and the right permissions are granted to open the file. Extraction can be done in a different folder as well or using a third-party unzip program. A macOS update might be the solution for these few compatibility issues.