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When I downloaded it the DMG file was 12.2Mb. I was suspicious of why an app this small in function would require such a large download, and looked inside, but
by rjmunro 6y ago
When I downloaded it the DMG file was 12.2Mb. I was suspicious of why an app this small in function would require such a large download, and looked inside, but the actual contents was only 1.4Mb, half of which was icons etc., which seems much more reasonable. If I right click on Unclack.app and choose "compress", I get a file under 1Mb in size.
Does this always happen with DMG files, or is there something weird going on here? This file is 10× bigger than it could be.
- michelb 6y agoThe minimum size for an empty DMG I could create on my mac was 8Mb. If I make the DMG directly from the folder with the app in it, it becomes 1.2Mb. Maybe the developer uses a script that makes it this size.
- kccqzy 6y agoDMGs are essentially disk images. So there's a lot of metadata there, inherent to the file system (HFS+ here but any file system would have metadata). Not to mention, there could be plenty of empty space if the virtual disk is bigger than the contained files. DMG compression is also optional, so not everyone compresses them. The DMG in this case is clearly not compressed. Compressing the DMG itself results in a file less than a megabyte.