Updates an existing mac application by name

<mac_application>
	<general>
		<name>TextWrangler.app</name>
		<version>5.5.2</version>
		<is_free>true</is_free>
		<bundle_id>com.barebones.textwrangler</bundle_id>
		<url>https://itunes.apple.com/us/app/textwrangler/id404010395?mt=12&amp;amp;uo=4</url>
		<category>
			<id>-1</id>
			<name>Unknown</name>
		</category>
		<site>
			<id>-1</id>
			<name>None</name>
		</site>
	</general>
	<scope>
		<all_computers>false</all_computers>
		<all_jss_users>false</all_jss_users>
	</scope>
	<self_service>
		<install_button_text>Install</install_button_text>
		<self_service_description>Installs the TextWrangler application</self_service_description>
		<force_users_to_view_description>true</force_users_to_view_description>
		<self_service_icon></self_service_icon>
		<feature_on_main_page>true</feature_on_main_page>
		<self_service_categories></self_service_categories>
		<notification>string</notification>
		<notification_subject>TextWrangler is Available to Install</notification_subject>
		<notification_message>You can install TextWrangler by clicking this link or going to Self Service</notification_message>
		<vpp>
			<assign_vpp_device_based_licenses>false</assign_vpp_device_based_licenses>
			<vpp_admin_account_id>-1</vpp_admin_account_id>
		</vpp>
	</self_service>
</mac_application>