diff --git a/src/KeyboardInputModal.js b/src/KeyboardInputModal.js
index 27f1a8e6..b2d982a1 100644
--- a/src/KeyboardInputModal.js
+++ b/src/KeyboardInputModal.js
@@ -10,6 +10,7 @@ import type {KeyDef, KeyboardInputScheme, KeyboardInputSchemeName} from './Keybo
 import {KeyboardInputSchemes, getLabelMessageKeyFromKeyDef, getIconMessageKeyFromKeyDef} from './KeyboardInputSchemes';
 
 import ToggleSwitch from './ToggleSwitch';
+import { isAppleDevice } from './Utils';
 
 import { ReactComponent as KeyboardIcon} from './svg/Keyboard.svg'
 
@@ -94,6 +95,8 @@ class KeyboardInputModal extends React.Component<KeyboardInputModalProps, Keyboa
         const keyboardInputScheme: KeyboardInputScheme = KeyboardInputSchemes[this.state.keyboardInputSchemeName];
 
         const keyBindingElements = [];
+        const altSuffix = isAppleDevice() ? "Option" : "Alt";
+
         keyBindings.forEach((key, index) => {
             const itemKey = "binding-" + index;
             const keyDef: KeyDef = keyboardInputScheme[key].keyDef;
@@ -115,12 +118,12 @@ class KeyboardInputModal extends React.Component<KeyboardInputModalProps, Keyboa
 
                 if (keyDef.altKey) {
                     const altKeyLabel = this.props.intl.formatMessage(
-                        { id: "KeyboardInputModal.KeyLabels.Alt" }
+                        { id: "KeyboardInputModal.KeyLabels." + altSuffix }
                     );
                     labelKeySegments.unshift(altKeyLabel);
 
                     const altKeyIcon = this.props.intl.formatMessage(
-                        { id: "KeyboardInputModal.KeyIcons.Alt" }
+                        { id: "KeyboardInputModal.KeyIcons." + altSuffix }
                     );
                     icons.unshift(<div key="alt-modifier" className="KeyboardInputModal__binding__icon">
                         {altKeyIcon}
@@ -141,7 +144,15 @@ class KeyboardInputModal extends React.Component<KeyboardInputModalProps, Keyboa
                     </div>);
                 }
 
-                const labelKeyString = labelKeySegments.join(" + ")
+                let labelKeyString = labelKeySegments[0];
+                if (labelKeySegments.length > 1) {
+                    if (labelKeySegments.length > 2) {
+                        labelKeyString += ", " + labelKeySegments.slice(1, labelKeySegments.length - 1).join(", ") + ",";
+                    }
+
+                    labelKeyString += " and " + labelKeySegments[labelKeySegments.length - 1];
+                }
+
                 const descriptionMessageKey = "KeyboardInputModal.Description." + key;
                 const descriptionMessageId = "key-binding-description-" + index;
                 keyBindingElements.push(<li className="KeyboardInputModal__binding" key={itemKey}>
@@ -163,10 +174,15 @@ class KeyboardInputModal extends React.Component<KeyboardInputModalProps, Keyboa
     }
 
     renderKeyboardSchemeMenu () {
+        const altSuffix = isAppleDevice() ? "Option" : "Alt";
+        const altKeyLabel = this.props.intl.formatMessage(
+            { id: "KeyboardInputModal.KeyLabels." + altSuffix }
+        );
+
         const selectOptionElements = [];
         Object.keys(KeyboardInputSchemes).forEach((schemeName) => {
             const messageId = "KeyboardInputModal.Scheme.Descriptions." + schemeName;
-            const optionText = this.props.intl.formatMessage({ id: messageId });
+            const optionText = this.props.intl.formatMessage({ id: messageId }, { alt: altKeyLabel });
             selectOptionElements.push(<option key={schemeName} value={schemeName}>
                 {optionText}
             </option>);
diff --git a/src/Utils.js b/src/Utils.js
index a443d655..d156a4f3 100644
--- a/src/Utils.js
+++ b/src/Utils.js
@@ -93,4 +93,15 @@ function focusByQuerySelector (selectors: string) {
     }
 }
 
-export { extend, focusByQuerySelector, generateId, makeDelayedPromise, generateEncodedProgramURL, getThemeFromString, getWorldFromString };
+const ApplePlatforms = [
+    "iPad",
+    "iPhone",
+    "iPod",
+    "MacIntel"
+]
+
+function isAppleDevice () :boolean {
+    return ApplePlatforms.indexOf(window.navigator.platform) !== -1;
+}
+
+export { extend, focusByQuerySelector, generateId, makeDelayedPromise, generateEncodedProgramURL, getThemeFromString, getWorldFromString, isAppleDevice };
diff --git a/src/messages.json b/src/messages.json
index 52015bb6..0ad9202a 100644
--- a/src/messages.json
+++ b/src/messages.json
@@ -128,33 +128,35 @@
         "Jungle.pond": "the Pond",
         "Jungle.tree": "a Tree",
         "KeyboardInputModal.Cancel": "Cancel",
-        "KeyboardInputModal.Description.addCommandToBeginning": "Press {key} to add the selected command to the beginning of the program.",
-        "KeyboardInputModal.Description.addCommandToEnd": "Press {key} to add the selected command to the end of the program.",
-        "KeyboardInputModal.Description.announceScene": "Press {key} to announce the character position and orientation.",
-        "KeyboardInputModal.Description.deleteCurrentStep": "Press {key} to delete the currently focused step.",
-        "KeyboardInputModal.Description.decreaseProgramSpeed": "Press {key} to make the program play slower.",
-        "KeyboardInputModal.Description.increaseProgramSpeed": "Press {key} to make the program play faster.",
-        "KeyboardInputModal.Description.playPauseProgram": "Press {key} to play or pause the program.",
-        "KeyboardInputModal.Description.refreshScene": "Press {key} to refresh the scene.",
+        "KeyboardInputModal.Description.addCommandToBeginning": "Press {key} together to add the selected command to the beginning of the program.",
+        "KeyboardInputModal.Description.addCommandToEnd": "Press {key} together to add the selected command to the end of the program.",
+        "KeyboardInputModal.Description.announceScene": "Press {key} together to announce the charactaer position and orientation.",
+        "KeyboardInputModal.Description.deleteCurrentStep": "Press {key} together to delete the currently focused step.",
+        "KeyboardInputModal.Description.decreaseProgramSpeed": "Press {key} together to make the program play slower.",
+        "KeyboardInputModal.Description.increaseProgramSpeed": "Press {key} together to make the program play faster.",
+        "KeyboardInputModal.Description.playPauseProgram": "Press {key} together to play or pause the program.",
+        "KeyboardInputModal.Description.refreshScene": "Press {key} together to refresh the scene.",
         "KeyboardInputModal.Description.showHide": "Press {key} to show / hide the keyboard shortcuts menu.",
-        "KeyboardInputModal.Description.stopProgram": "Press {key} to stop the program.",
-        "KeyboardInputModal.Description.toggleAnnouncements": "Press {key} to toggle announcements.",
+        "KeyboardInputModal.Description.stopProgram": "Press {key} together to stop the program.",
+        "KeyboardInputModal.Description.toggleAnnouncements": "Press {key} together to toggle announcements.",
         "KeyboardInputModal.KeyLabels.Alt": "Alt",
         "KeyboardInputModal.KeyLabels.Control": "Control",
+        "KeyboardInputModal.KeyLabels.Option": "Option",
         "KeyboardInputModal.KeyLabels.QuestionMark": "question mark",
         "KeyboardInputModal.KeyLabels.GreaterThan": "greater than",
         "KeyboardInputModal.KeyLabels.LessThan": "less than",
-        "KeyboardInputModal.KeyLabels.A": "a",
-        "KeyboardInputModal.KeyLabels.B": "b",
-        "KeyboardInputModal.KeyLabels.D": "d",
-        "KeyboardInputModal.KeyLabels.E": "e",
-        "KeyboardInputModal.KeyLabels.I": "i",
-        "KeyboardInputModal.KeyLabels.P": "p",
-        "KeyboardInputModal.KeyLabels.S": "s",
-        "KeyboardInputModal.KeyLabels.R": "r",
+        "KeyboardInputModal.KeyLabels.A": "A",
+        "KeyboardInputModal.KeyLabels.B": "B",
+        "KeyboardInputModal.KeyLabels.D": "D",
+        "KeyboardInputModal.KeyLabels.E": "E",
+        "KeyboardInputModal.KeyLabels.I": "I",
+        "KeyboardInputModal.KeyLabels.P": "P",
+        "KeyboardInputModal.KeyLabels.S": "S",
+        "KeyboardInputModal.KeyLabels.R": "R",
         "KeyboardInputModal.KeyIcons.Alt": "Alt",
         "KeyboardInputModal.KeyIcons.Control": "Ctrl",
         "KeyboardInputModal.KeyIcons.Shift": "Shift",
+        "KeyboardInputModal.KeyIcons.Option": "⌥",
         "KeyboardInputModal.KeyIcons.QuestionMark": "?",
         "KeyboardInputModal.KeyIcons.GreaterThan": ">",
         "KeyboardInputModal.KeyIcons.LessThan": "<",
@@ -167,8 +169,8 @@
         "KeyboardInputModal.KeyIcons.S": "S",
         "KeyboardInputModal.KeyIcons.R": "R",
         "KeyboardInputModal.Save": "Save",
-        "KeyboardInputModal.Scheme.Descriptions.controlalt": "Control+Alt (Apple: Control+Option)",
-        "KeyboardInputModal.Scheme.Descriptions.alt": "Alt (Apple: Option)",
+        "KeyboardInputModal.Scheme.Descriptions.controlalt": "Control+{alt}",
+        "KeyboardInputModal.Scheme.Descriptions.alt": "{alt}",
         "KeyboardInputModal.ShowHide.AriaLabel": "Display keyboard shortcuts menu",
         "KeyboardInputModal.Title": "Keyboard Shortcuts",
         "KeyboardInputModal.Toggle.AriaLabel": "Turn keyboard shortcuts on or off",