「このアプリケーションで開く」で重複表示があるときの修正方法

小ネタ。
ターミナルからlsregisterコマンドを実行。Finderを再起動する。

$ cd /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchServices.framework/Versions/A/Support
$ ./lsregister -kill -r -domain system -domain local -domain user
$ killall Finder

Mac OS のバージョンによってはlsregisterの場所が違うようです。

追記（2019/12/18）:

% /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchServices.framework/Versions/A/Support/lsregister --help
lsregister: [OPTIONS] [ <path>... ]
                      [ -apps <domain>[,domain]... ]
                      [ -libs <domain>[,domain]... ]
                      [ -all  <domain>[,domain]... ]

Paths are searched for applications to register with the Launch Service database.
Valid domains are "system", "local", "network" and "user". Domains can also
be specified using only the first letter.

  -delete       Delete the Launch Services database file. You must then reboot!
  -kill         Reset the Launch Services database before doing anything else
  -seed         If database isn't seeded, scan default locations for applications and libraries to register
  -lint         Print information about plist errors while registering bundles
  -lazy n       Sleep for n seconds before registering/scanning
  -r            Recursive directory scan, do not recurse into packages or invisible directories
  -R            Recursive directory scan, descending into packages and invisible directories
  -f            force-update registration even if mod date is unchanged
  -u            unregister instead of register
  -v            Display progress information
  -gc           Garbage collect old data and compact the database
  -dump [table] Display full database contents after registration
  -h            Display this help