9/5/2023 0 Comments Create zip file macOther readers may want to check into that since it doesn't require installing any software. YMMV with other versions.Īnother way to generate Zip files on Windows is to use Powershell's Compress-Archive. This tag seems to be a bit of a rabbit hole, but suffice it to say, the jar utility does add it to files it generates. This is sort of a "feature" of the JAR format, which is a Zip but may have a special 0xcafe tag. From here select the Compress File Name option, which will create a zip file that uses the same filename except with. Control-click or use the two-finger tap gesture on your trackpad to bring up the contextual menu. You can see that file detected the zip as a JAR file, not a Zip file. To create your zip file, find the file or folder that you want to compress. (You could also run file asdf.zip yourself to find out the magic.) Then the output will show in the system log (Console.app). You can find out the file output that was produced by setting the following defaults key: $ defaults write log-commands -bool TRUEĪnd opening the file in Archive Utility. I'm guessing that the Archive Utility developers didn't want to rely on the file extension to determine whether something is a zip, so they rely on the file output. In order to detect the file as a valid zip file, the file magic result must say "Zip archive data". Check the file magic using /usr/bin/file.Looking under the hood of Archive Utility, it turns out that it does two things to check the file type: Thanks for posting this interesting question.
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