Changes between Initial Version and Version 1 of Ticket #7274


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Timestamp:
Jul 13, 2022, 2:20:02 PM (3 years ago)
Author:
Tom Goddard
Comment:

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  • Ticket #7274 – Description

    initial v1  
    1 Zach observed that he Mac distribution dmg file (.dmg) can be made much smaller (60% of dmg size) using instead an LZMA compressed tar file (.tar.xz made with tar -cfJ), ticket #7250 comment 13.  This would reduce our 400 Mbyte Mac distribution to about 240 Mbytes.
     1Zach observed that the Mac distribution dmg file (.dmg) can be made much smaller (60% of dmg size) using instead an LZMA compressed tar file (.tar.xz made with tar -cfJ), ticket #7250 comment 13.  This would reduce our 400 Mbyte Mac distribution to about 240 Mbytes.
    22
    33The dmg format supports LZMA compression but only from macOS 10.15 onward, and testing it gave dmg size that was 70% of the current dmg (which uses zlib level 1 compression).  But we currently distribute on macOS 10.14.  I tested on our build machine essex.cgl.ucsf.edu and the LZMA compressed dmg indeed fails to mount (error is "corrupted file", using command "hdiutil attach cx1.4_lzma.dmg").