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I'm making new icons for all my disks/partitions (all macos). All the apps/scripts I've tried, output the 128x128 as "ic07". None of the other sizes within the ICNS file have an issue with type, but 128x128 is the size that displays during boot up, and it WILL NOT display "ic07". Looking at sample ICNS that WILL load during boot up, and they are all icon type "it32".

The simplest ICNS creating apps I have found ask for a single image input, then spit out a completed ICNS. I was hoping to find one that outputs the 128x128 within the ICNS as "it32" (or other type that WILL show during boot). I'm not concerned about any of the other sizes' icon type yet.

Or, I don't know if this is possible, is there a way to configure the input image, so the output ICNS is automatically built with "it32"?

Thanks

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I'm not a pro in icons, but you should take a look at Homebrew to get this done. If you're not familiar of what Homebrew is, it's a package manager for apps/software.

Doing a quick search, there are two apps in homebrew that seem to be able to generate ICNS: libicns and makeicns.

The makeicns seems to do the job (tried locally). First you'd need to install the package with

brew install makeicns

Then the syntax to make a 32x32 icon in makeicns is:

makeicns -32 image.png

Which creates image.icns with only a 32x32 variant. I've tried locally and go a 32x32 .icns file.

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  • Installed Homebrew. Installing libicns, but maybe I am 2 OS versions too old for libicns, unless they have older versios that can be downloaded.I looked quick and didn't see anything. Seems to be stuck at "make" in terminal anyway. MakeICNS. I can probably redo on my Bg Sur drive insteadand tray again, bt I have some tasks running right now.
    – sbimos
    Commented Nov 29, 2023 at 23:39
  • ok, it LOOKS like makeicns will work, as it creates "il32" for 128x128, but wht the heck is "otherfile.png"?
    – sbimos
    Commented Nov 30, 2023 at 0:21
  • Where do you see "otherfile.png"?
    – danz
    Commented Nov 30, 2023 at 21:28
  • when you type MAKEICNS into Terminal, at the end of the data that returns, are 2 example commands. The 2nd example includes a placeholder labeled "otherfile.png".
    – sbimos
    Commented Dec 1, 2023 at 5:29
  • makeicns -in myfile.jpg -32 otherfile.png -out outfile.icns : Creates outfile.icns with sizes 512, 256, 128, and 16 containing data from myfile.jpg and with size 32 containing data from otherfile.png . This is only used if you want to use another image to make one of the other sizes.
    – danz
    Commented Dec 4, 2023 at 21:44

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