\mode<presentation>

\setbeamercolor{foot left}{fg=ibmcoolgray60}
\setbeamercolor{foot center}{fg=ibmcoolgray60}
\setbeamercolor{foot right}{fg=ibmcoolgray60}

\setbeamerfont{foot left}{family=\fontspec{IBMPlexMono-Regular.otf}, size=\tiny}
\setbeamerfont{foot center}{family=\fontspec{IBMPlexMono-Regular.otf}, size=\tiny}
\setbeamerfont{foot right}{family=\fontspec{IBMPlexMono-Regular.otf}, size=\tiny}

\newcommand{\ibmbeamerfootermargin}{2ex}

\defbeamertemplate*{footline}{}
{%
  \leavevmode%
  \hbox{%
  \begin{beamercolorbox}[wd=.333333\paperwidth,ht=3.25ex,dp=1ex,sep=\ibmbeamerfootermargin,left]{foot left}%
    \usebeamerfont{foot left}\ifdef\printfooterleft{\printfooterleft}{}
  \end{beamercolorbox}%
  \begin{beamercolorbox}[wd=.333333\paperwidth,ht=3.25ex,dp=1ex,sep=\ibmbeamerfootermargin,center]{foot center}%
    \usebeamerfont{foot center}\ifdef\printfootercenter{\printfootercenter}{}
  \end{beamercolorbox}%
  \begin{beamercolorbox}[wd=.333333\paperwidth,ht=3.25ex,dp=1ex,sep=\ibmbeamerfootermargin,right]{foot right}%
    \usebeamerfont{foot right}\insertframenumber\,/\,\inserttotalframenumber
  \end{beamercolorbox}}%
  \vskip-\ibmbeamerfootermargin%
}

\mode<all>