wimlib

You need to use FSCTL_SET_EXTERNAL_BACKING. Take a look at the code here.

Please see the COPYING file.

Applied, thanks.

The NTFS-3G image application mode actually works *only* on raw partitions, not on mounted filesystems. The commands you gave only partitioned the disk, and didn't create an NTFS filesystem on it. Are you sure that you created an NTFS filesystem on it? That would require using the mkntfs program fro...

This is expected since Microsoft's software doesn't support non-default compression chunk sizes, as described in the documentation.

There isn't any workaround for wimlib using memory proportional to the number of files in the WIM image; this is fairly fundamental to wimlib's design. You could maybe split your files into multiple images.

This sounds like an issue with Homebrew and not with wimlib upstream.

Yes, as documented the NTFS-3G image application mode works on a block device containing an NTFS filesystem directly, rather than a mounted filesystem.

Could you contribute a patch for this?

I don't see any issue; all release files match the ones I originally uploaded. For the 1.13.5 release the SHA-256 checksums are: 32fcc9e9b144b7cb1db4c86e104ca78283cdc225e13fe82b273660586aefe323 wimlib-1.13.5.tar.gz 59d0c960e14af4ad18da47aace9802f0eee3b11f647422165ef0b72e12cc529c wimlib-1.13.5-window...