Apple has long bundled an instance of PHP as part of the default install. However since Mac OS 10.10 Yosemite they have dropped PNG support from GD.
What would currently be the most efficient way of substituting the functionality? I can't go around to everyone's computer and manually replace the php binary with a version from homebrew as commonly suggested, and my next favourite tool (imagemagick) I could use to do a quick file format conversion doesn't ship with Mac OS either.
Since I am fortunately in charge of the code, what are the alternatives/workarounds to load a PNG file into the default PHP install? Preferably it should not require any Mac OS specifics as the same code has to work on a few linux machines as well.
