So use this one from the hdiutil man page, right?
ULFO - UDIF lzfse-compressed image (OS X 10.11+ only)
or is there a newer "UFLO" available but not documented in the man page?
Quote:
Originally Posted by kovidgoyal
If you dont download the dmg using safari, it wont trigger gatekeeper as safari is what sets the attributes of the dmg file that tell gatekeeper that the app was downloaded form the internet and needs to be checked. And ust FYI on newer versions of macOS you can use UFLO rmat for dmg which greatly improves compression.
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edit:
Okay using this command line to generate a dmg:
hdiutil create ./Sigil-0.9.18-Mac-Package.dmg -volname "Sigil" -srcfolder ./Sigil.app -format ULFO
gives me
124508032 6 Sep 11:07 Sigil-0.9.18-Mac-Package.dmg
Using .tar.xz (.txz) on the app itself gives me
78071020 3 Sep 11:22 Sigil.app-0.9.18-Mac.txz
So I am saving roughly 40 to 46 meg of download by using tar.xz just on Sigil.app
Am I simply using the wrong command options on hdiutil?