diff --git a/config/gpg-agent.conf b/config/gpg-agent.conf
index a623e78..fea14a8 100644
--- a/config/gpg-agent.conf
+++ b/config/gpg-agent.conf
@@ -5,12 +5,26 @@ ttyname $GPG_TTY
 default-cache-ttl 60
 max-cache-ttl 120
 # Select a valid program path for PIN entry prompt
-pinentry-program /usr/bin/pinentry-curses
+# -- Linux (default /usr/bin/pinentry)
+#pinentry-program /usr/bin/pinentry
+#pinentry-program /usr/bin/pinentry-curses
 #pinentry-program /usr/bin/pinentry-gnome3
 #pinentry-program /usr/bin/pinentry-tty
 #pinentry-program /usr/bin/pinentry-x11
+# -- macOS - Intel silicon (default /usr/local/bin/pinentry)
+#pinentry-program /usr/local/bin/pinentry
 #pinentry-program /usr/local/bin/pinentry-curses
 #pinentry-program /usr/local/bin/pinentry-mac
+#pinentry-program /usr/local/bin/pinentry-tty
+# -- macOS - Apple silicon (default /opt/homebrew/bin/pinentry)
+#pinentry-program /opt/homebrew/bin/pinentry
+#pinentry-program /opt/homebrew/bin/pinentry-curses
 #pinentry-program /opt/homebrew/bin/pinentry-mac
+#pinentry-program /opt/homebrew/bin/pinentry-tty
+# -- macOS - MacPorts
+#pinentry-program /opt/local/bin/pinentry
+# -- macOS - MacGPG2
+#pinentry-program /usr/local/MacGPG2/libexec/pinentry-mac.app/Contents/MacOS/pinentry-mac
+# -- Windows
 # https://developers.yubico.com/PGP/SSH_authentication/Windows.html
 #enable-win32-openssh-support