I am running Mojave 10.14.6 (on a late 2013 MacBook Pro), waiting to upgrade to Catalina. From a previous post that I haven’t been able to find again I copied and followed these instructions Checking for 32bit applications lead to find my 32-bit apps:
You can also use Spotlight's CLI tool, ‘mdfind’ (/usr/bin/mdfind) on the command line. Run the following in Terminal: mdfind "kMDItemExecutableArchitectures == 'i386' && kMDItemExecutableArchitectures != 'x86'"
Which returned a long list of things likecontaining
/System/Library/Frameworks/DiscRecording.framework/Versions/A/Resources/draudiotool /System/Library/Frameworks/AppKitScripting.framework/Versions/A/AppKitScripting /System/Library/PrivateFrameworks/vmutils.framework/Versions/A/vmutils /System/Library/PrivateFrameworks/CoreMediaPrivate.framework/Versions/A/CoreMediaPrivate
/System/Library/Frameworks/DiscRecording.framework/Versions/A/Resources/draudiotool
/System/Library/Frameworks/AppKitScripting.framework/Versions/A/AppKitScripting
/System/Library/PrivateFrameworks/vmutils.framework/Versions/A/vmutils
/System/Library/PrivateFrameworks/CoreMediaPrivate.framework/Versions/A/CoreMediaPrivate
(which seem to be mostly Unix executable files), some dynamic libraries, a few apps, and then some items like this
/sbin/autodiskmount /usr/sbin/pictd /usr/lib/libnetsnmp.5.2.1.dylib /usr/bin/qc2movie
/sbin/autodiskmount
/usr/sbin/pictd
/usr/lib/libnetsnmp.5.2.1.dylib
/usr/bin/qc2movie
Are these 32-bit code files that are going to block the use of apps, even if the apps are 64-bit? Will installing Catalina remove them, or should I delete them first? I can delete the apps (don’t need or can upgrade them), but is there anything I can do ahead of time with this list?