Likewise accelerators it should be possible to have tooltips depending on the actual operating system.
<node oor:name=".uno:Foo" oor:op="replace">
<prop oor:name="Foo" oor:type="xs:string">
<prop oor:name="TooltipLabel" oor:type="xs:string">
<value xml:lang="en-US">Foo with bar</value>
<value xml:lang="en-US" install:module="macosx">Foo with cmd</value>
<value xml:lang="en-US" install:module="unxwnd">Foo with ctrl</value>
Doubt we need OS specific bugs, as it would mean additional translation for the exact same string, and instead we should have coding done that automatically replaces 'Ctrl' with 'Cmd' in tooltips for Mac.