diff --git a/common/abstractprotocol.h b/common/abstractprotocol.h
index 5206662..84388ae 100644
--- a/common/abstractprotocol.h
+++ b/common/abstractprotocol.h
@@ -35,9 +35,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 #define BASE_DEC (10)
 #define BASE_HEX (16)
 
-#define uintToHexStr(num, bytes)    \
-    QString("%1").arg(num, bytes*2, BASE_HEX, QChar('0'))
-
 class StreamBase;
 class ProtocolListIterator;
 
diff --git a/common/abstractprotocolconfig.h b/common/abstractprotocolconfig.h
index 4172a7c..a65c959 100644
--- a/common/abstractprotocolconfig.h
+++ b/common/abstractprotocolconfig.h
@@ -23,6 +23,12 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 
 class AbstractProtocol;
 
+/*!
+  Convenience Macro - can be used by loadWidget() methods
+*/
+#define uintToHexStr(num, bytes)    \
+    QString("%1").arg(num, bytes*2, BASE_HEX, QChar('0'))
+
 class AbstractProtocolConfigForm : public QWidget
 {
     Q_OBJECT
@@ -80,7 +86,7 @@ public:
     }
 
 /*!
-  Convenience Method - can be used by storeConfigWidget() implementations
+  Convenience Method - can be used by storeWidget() implementations
 */
     uint hexStrToUInt(QString text, bool *ok=NULL)
     {
@@ -94,7 +100,7 @@ public:
     }
 
 /*!
-  Convenience Method - can be used by storeConfigWidget() implementations
+  Convenience Method - can be used by storeWidget() implementations
 */
     quint64 hexStrToUInt64(QString text, bool *ok=NULL)
     {
diff --git a/common/arp.cpp b/common/arp.cpp
index 11675a1..aee20ce 100644
--- a/common/arp.cpp
+++ b/common/arp.cpp
@@ -20,6 +20,11 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 #include "arp.h"
 
 #include <QHostAddress>
+#include <QRegExp>
+
+#define uintToMacStr(num)    \
+    QString("%1").arg(num, 6*2, BASE_HEX, QChar('0')) \
+        .replace(QRegExp("([0-9a-fA-F]{2}\\B)"), "\\1:").toUpper()
 
 ArpProtocol::ArpProtocol(StreamBase *stream, AbstractProtocol *parent)
     : AbstractProtocol(stream, parent)
@@ -295,7 +300,7 @@ QVariant ArpProtocol::fieldData(int index, FieldAttrib attrib,
                 case FieldValue:
                     return hwAddr;
                 case FieldTextValue:
-                    return uintToHexStr(hwAddr, 6);
+                    return uintToMacStr(hwAddr);
                 case FieldFrameValue:
                 {
                     QByteArray fv;
@@ -403,7 +408,7 @@ QVariant ArpProtocol::fieldData(int index, FieldAttrib attrib,
                 case FieldValue:
                     return hwAddr;
                 case FieldTextValue:
-                    return uintToHexStr(hwAddr, 6);
+                    return uintToMacStr(hwAddr);
                 case FieldFrameValue:
                 {
                     QByteArray fv;
diff --git a/common/mac.cpp b/common/mac.cpp
index ec2bcc6..70d047b 100644
--- a/common/mac.cpp
+++ b/common/mac.cpp
@@ -19,6 +19,12 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 
 #include "mac.h"
 
+#include <QRegExp>
+
+#define uintToMacStr(num)    \
+    QString("%1").arg(num, 6*2, BASE_HEX, QChar('0')) \
+        .replace(QRegExp("([0-9a-fA-F]{2}\\B)"), "\\1:").toUpper()
+
 MacProtocol::MacProtocol(StreamBase *stream, AbstractProtocol *parent)
     : AbstractProtocol(stream, parent)
 {
@@ -129,7 +135,7 @@ QVariant MacProtocol::fieldData(int index, FieldAttrib attrib,
                 case FieldValue:
                     return dstMac;
                 case FieldTextValue:
-                    return uintToHexStr(dstMac, 6);
+                    return uintToMacStr(dstMac);
                 case FieldFrameValue:
                 {
                     QByteArray fv;
@@ -174,7 +180,7 @@ QVariant MacProtocol::fieldData(int index, FieldAttrib attrib,
                 case FieldValue:
                     return srcMac;
                 case FieldTextValue:
-                    return uintToHexStr(srcMac, 6);
+                    return uintToMacStr(srcMac);
                 case FieldFrameValue:
                 {
                     QByteArray fv;