Hello. The link handling for org mode behaves unexpectedly where a file sets org mode according to `Local variables:' at the end of the file.
In the following, a.org and b.org files work as expected using M-x org-store-link and M-x org-insert-link for `file:' link. Without the .org filename extension, following the link calls `open file:' which leads to Org Mode opening the file with TextEdit under mac os, Emacs 26.1 rc-1. ;;;; ------------------------------------ ;; running : Emacs.app/Contents/MacOS/Emacs -Q ;; problem : This two file arrangment for `Emacs -Q' *fails* to follow the link. ;; expect : Emacs to open a link to org file. ;; unexpected : Emacs calls TextEdit to open org file. ;; solution : if file a and b are called a.org and b.org then there is no problem. ;; Solution needs org files named without the `.org’ extension ;; to follow `file:’ links without leaving Emacs. ;;;; ------------------------------------ ;; file : a * one ** two *** three [[file:b::*title%20%E4%B8%AD][title 中]] # Local variables: # mode: org # End: ;;;; ------------------------------------ ;; file : b * work ** title 中 *** chapter # Local variables: # mode: org # End: ;;;; ============================================================ ;; file a.org * one ** two *** three [[file:b.org::*title%20%E4%B8%AD][title 中]] ;;;; ============================================================ ;; file b.org * work ** title 中 *** chapter