dmginstallm1universal-binaries
Can you tell from a .dmg file if it contains arm64 binaries?
I've got a Mac mini M1 running Big Sur. I don't want to run apps under Intel, only arm64. I don't even have Rosetta installed, and want to avoid installing it.
I can install apps, try to run them, and see if they request Rosetta installation. But I'd like to know if the .dmg file contains binaries compiled for arm64 without running the application.
Download the dmg from Adobe's website. Mount it and right click on the Install Adobe Flash Player.app and select "Show Package Contents."
Drill down into Contents > Resources:
Launch the Adobe Flash Player.pkg:
When the plugin installer launches, go to File > Show Files (or CMD + I).
There you will see a list of the files it installs and where. You'll need to use something like Pacifist to extract the contents, but once you do, you can install the files manually. And yes, the install would be just as clean if you used the pkg to install the plugin. It's not any safer, it's just an alternate route that doesn't have the Adobe wrapper (so it doesn't use Adobe's proprietary installer).
The OS doens't allow that out of the box (neither for dmg nor real partitions).
What I would do is create a script that would listen to that mounted image and after x time idle, unmount it.
Applescript is a fairly simple way to get that working (or via an automator flow).
Some pointers:
(the tricky part is getting the disk image idle)
http://www.mactech.com/articles/mactech/Vol.20/20.07/FolderWatching/index.html
Checking for folder/file changes using Automator?
How to run Applescript on Disk mount
Automatically launch a program or action when an external drive or disk is connected
I'll make an example later today, but the flow will be like this:
open script
drag mounted image disk to it
monitor this disk access (every x time, to save processor)
if last time accessed > idlelimit then
eject disk
quit script
otherwise
keep checking
Best Answer
A DMG is just a container, it doesn't know about it contents.
If application is distributed without a package (so it's application you can just drag&drop to
/Applications) you can runto see what kind of binary it is.