combine pdf

Apparently the Automator action relied upon Python. And since Python gone, the action no longer works. there are some suggested alternatives here, but Apple really should’ve detected this beforehand (I.e., in terms of dependencies etc.) https://discussions.apple.com/thread/253764288

I download tons of music from IMSLP, but like to combine the individual .pdf files, of a common work, in to one larger file. For example, the nine small preludes by Bach (BWV 924-931; the ninth was never finished). Normally, you open the first .pdf file, select thumbnail view (which lists the...