diff --git a/debug/iterm.zsh b/debug/iterm.zsh
index f9752540..702175ff 100755
--- a/debug/iterm.zsh
+++ b/debug/iterm.zsh
@@ -3,12 +3,13 @@
 
 if [[ "$TERM_PROGRAM" != "iTerm.app" ]]; then
     print "Your Terminal Emulator does not appear to be iTerm2!"
+    print "This debug script is intended only for iTerm2 terminals."
     exit 1
 fi
 
 if [[ ! -x "/usr/libexec/PlistBuddy" ]]; then
     print "To use this debug script, you need to install XCode!"
-    exit 1
+    exit 2
 fi
 
 local normalFont
@@ -18,17 +19,17 @@ local ambiguousDoubleWidth
 local minimumContrast
 local useDifferentFont
 
-# Unfortunately the profile name is not unique, but it seems to be the only thing
-# that identifies an active profile. There is the "id of current session of current window"
-# thou, but that does not match to a guid in the plist.
-# So, be warned! Collisions may occur!
+# Unfortunately the profile name is not unique, but it seems to be the only
+# thing that identifies an active profile. There is the "ID of current session
+# of current window" though, but that does not match to a `guid` in the plist.
+# So, be warned - collisions may occur!
 # See: https://groups.google.com/forum/#!topic/iterm2-discuss/0tO3xZ4Zlwg
 local currentProfileName=$(osascript -e 'tell application "iTerm2" to profile name of current session of current window')
 
 # Warning: Dynamic profiles are not taken into account here!
 # https://www.iterm2.com/documentation-dynamic-profiles.html
 
-# Count Guids in "New Bookmarks"; they should be unique
+# Count `guids` in "New Bookmarks"; they should be unique
 local profilesCount=$(/usr/libexec/PlistBuddy -c "Print :New\ Bookmarks:" ~/Library/Preferences/com.googlecode.iterm2.plist 2>/dev/null | grep -c "Guid")
 for idx in $(seq 0 "${profilesCount}"); do
     local profileName=$(/usr/libexec/PlistBuddy -c "Print :New\ Bookmarks:${idx}:Name:" ~/Library/Preferences/com.googlecode.iterm2.plist 2>/dev/null)
@@ -41,7 +42,7 @@ for idx in $(seq 0 "${profilesCount}"); do
         minimumContrast=$(/usr/libexec/PlistBuddy -c "Print :New\ Bookmarks:${idx}:Minimum\ Contrast:" ~/Library/Preferences/com.googlecode.iterm2.plist)
 
         # Font for non-ascii characters
-        # Only check for a different non-ascii font, if the user checked
+        # Only check for a different non-ASCII font, if the user checked
         # the "use a different font for non-ascii text" switch.
         useDifferentFont=$(/usr/libexec/PlistBuddy -c "Print :New\ Bookmarks:${idx}:Use\ Non-ASCII\ Font:" ~/Library/Preferences/com.googlecode.iterm2.plist)
         if [[ "$useDifferentFont" == "true" ]]; then
@@ -69,7 +70,7 @@ fi
 if (( minimumContrast > 0 )); then
     problemsFound="${problemsFound}\n  * Please set minimum contrast to zero."
 fi
-if [[ $(echo "${normalFont}" | grep -c -E "Powerline|Awesome|Nerd") -eq 0 ]]; then
+if [[ $(echo "${normalFont}" | grep -c -E "Powerline|Awesome|Nerd|Source Code Pro") -eq 0 ]]; then
     problemsFound="${problemsFound}\n  * It does not seem like you use an Powerline-enabled or Awesome Terminal Font!"
 fi
 
@@ -82,4 +83,4 @@ if [[ -n "${problemsFound}" ]]; then
     print -P "${problemsFound}"
 else
     print -P "%F{green}No Problems found%f. Yay!"
-fi
\ No newline at end of file
+fi