Convert SVG file to macOS icon (icns) format

svg2icns.sh

#!/bin/sh -x

set -e

SIZES="
16,16x16
32,16x16@2x
32,32x32
64,32x32@2x
128,128x128
256,128x128@2x
256,256x256
512,256x256@2x
512,512x512
1024,512x512@2x
"

for SVG in "$@"; do
    BASE=$(basename "$SVG" | sed 's/\.[^\.]*$//')
    ICONSET="$BASE.iconset"
    mkdir -p "$ICONSET"
    for PARAMS in $SIZES; do
        SIZE=$(echo $PARAMS | cut -d, -f1)
        LABEL=$(echo $PARAMS | cut -d, -f2)
        svg2png -w $SIZE -h $SIZE -i "$SVG" -o "$ICONSET"/icon_$LABEL.png
    done

    iconutil -c icns "$ICONSET"
    rm -rf "$ICONSET"
done

Not sure which version of svg2png was used here but the latest one doesn't have the -i flag. Instead it needs to be an argument i.e.

svg2png "$SVG" -w $SIZE -h $SIZE -o "$ICONSET"/icon_$LABEL.png

Current version installed via homebrew no longer uses -o either. Both filenames are simple arguments:

svg2png -w $SIZE -h $SIZE "$SVG" "$ICONSET"/icon_$LABEL.png

Loop over a directory of SVGs with the fixes mentioned above, while ignoring errors:

#!/bin/sh -x

set -e

SIZES="
16,16x16
32,16x16@2x
32,32x32
64,32x32@2x
128,128x128
256,128x128@2x
256,256x256
512,256x256@2x
512,512x512
1024,512x512@2x
"

FILES=/Zafiro-icons-master/apps/scalable/*
for SVG in $FILES
do
  echo "Processing $f file..."
  # take action on each file. $f store current file name
  BASE=$(basename "$SVG" | sed 's/\.[^\.]*$//')
    ICONSET="$BASE.iconset"
    mkdir -p "/icons/$ICONSET"
    for PARAMS in $SIZES; do
        SIZE=$(echo $PARAMS | cut -d, -f1)
        LABEL=$(echo $PARAMS | cut -d, -f2)
        svg2png -w $SIZE -h $SIZE "$SVG" "/icons/$ICONSET"/icon_$LABEL.png || true
    done

    iconutil -c icns "/icons/$ICONSET" || true
    rm -rf "$ICONSET"
done

Dependecies? Where do I get svg2png and iconutil?

I think I did brew install svg2png or similar. It's been a while but Google should find current answers.

Thank you for this! It works as expected and generates icns files with transparent background. 👍🏻