新改进过的7-zip算法（Power by 7-zip org），将DMG的部分算法引入ZIP，压缩比大幅提高，是RaR的2倍，ZIP的1.4倍（程序的各种说明没改变，仍是7-zip原版。）-New and improved over the 7-zip algorithm (Power by 7-zip org), part of the algorithm is introduced DMG ZIP, a substantial increase in compression ratio i

DMG文件转换为IMG文件工具源码，在网上找的-DMG files to IMG files tool source, find on Internet

7-zip是个文件压缩解压程序，支持7z, XZ, BZIP2, GZIP, TAR, ZIP, WIM, ARJ, CAB, CHM, CPIO, CramFS, DEB, DMG, FAT, HFS, ISO, LZH, LZMA, MBR, MSI, NSIS, NTFS, RAR, RPM, SquashFS, UDF, VHD, WIM, XAR-7-Zip is a file archiver with the high compression ratio. The program