Lowercase APPNAME on macOS Homebrew (#364)

Co-authored-by: Steven Silvester <[email protected]>

jupyter_core/paths.py

@@ -25,8 +25,13 @@
 
 pjoin = os.path.join
 
-# Capitalize Jupyter in paths only on Windows and MacOS
-APPNAME = "Jupyter" if sys.platform in ("win32", "darwin") else "jupyter"
+# Capitalize Jupyter in paths only on Windows and MacOS (when not in Homebrew)
+if sys.platform == "win32" or (
+    sys.platform == "darwin" and not sys.prefix.startswith("/opt/homebrew")
+):
+    APPNAME = "Jupyter"
+else:
+    APPNAME = "jupyter"
 
 # UF_HIDDEN is a stat flag not defined in the stat module.
 # It is used by BSD to indicate hidden files.