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Message: <blockquote data-quote="Ratsima" data-source="post: 1837947" data-attributes="member: 402210">You make a good point which is why I do most of my tinkering on other machines, like the two Raspberry Pies sitting on my desk. I use MacPorts, which installs in /opt/local/bin and which Catalina seems to link to the data volume. AFAIK MacPorts continues to work if you do a proper migration.BTW, if anyone's looking for a quick and dirty and non-GUI way to find 32 bit apps, this (which I got elsewhere) seems to work:[CODE]mdfind "kMDItemExecutableArchitectures == '*i386*' && kMDItemExecutableArchitectures != '*x86*'" | grep ^/Applications | grep  .app$  > ~/Documents/32bit.txt[/CODE]As Patrick noted, there are kexts and other add-ons out there that won't work with Catalina. I only have one that I know of (a USB kext for an UPS). I'll have to do without. But, as for Catalina, I remain undecided.</blockquote>