Here are the results of the two instructions. They were done both with Invisibles invisible and with Invisibles visible.
xattr -1 /Users/Beverley/Library/Preferences/.a23t.mk4e.plist
com.apple.TextEncoding: macintosh;0
strings /Users/Beverley/Library/Preferences/.a23t.mk4e.plist
streamtyped
NSNumber
NSValue
NSObject
Hey thanks man. That's it? Hmm, it seems so small.
I don't think it was anything bad... just unconventional.
If you would like to use Terminal to eradicate it, here are two choices...
RM - the basic Unix "remove" (for simple files like this, one could also type
unlink):
rm -f /Users/Beverley/Library/Preferences/.a23t.mk4e.plist
SRM - Apple's own "secure remove" to which i like adding the verbose option (for visual progress):
srm -fv /Users/Beverley/Library/Preferences/.a23t.mk4e.plist
Warning: those commands make stuff go away instantly... and there is no
"undo". So be sure the files they're aimed at are truly not needed anymore.