Make specific author bold using biblatex

boldauthorname.tex

% use boldface for specific author in biblatex bibliography
% http://tex.stackexchange.com/questions/73136/make-specific-author-bold-using-biblatex
%
% usage:
% \input{boldauthorname}
% ...
% \begin{document}
% \boldname{Doe}{John}{J.}
% \printbibliography
% \end{document}
%
% deactivate:
% \boldname{}{}{}
%
\def\makenamesetup{%
  \def\bibnamedelima{~}%
  \def\bibnamedelimb{ }%
  \def\bibnamedelimc{ }%
  \def\bibnamedelimd{ }%
  \def\bibnamedelimi{ }%
  \def\bibinitperiod{.}%
  \def\bibinitdelim{~}%
  \def\bibinithyphendelim{.-}}
\newcommand*{\makename}[2]{\begingroup\makenamesetup\xdef#1{#2}\endgroup}

\newcommand*{\boldname}[3]{%
  \def\lastname{#1}%
  \def\firstname{#2}%
  \def\firstinit{#3}}
\boldname{}{}{}

% Patch new definitions
\renewcommand{\mkbibnamegiven}[1]{%
  \makename{\currname}{#1}%
  \makename{\findname}{\firstname}%
  \makename{\findinit}{\firstinit}%
  \ifboolexpr{ test {\ifdefequal{\currname}{\findname}}%
    or test {\ifdefequal{\currname}{\findinit}} }%
  {\mkbibbold{#1}}{#1}%
}

\renewcommand{\mkbibnamefamily}[1]{%
  \makename{\currname}{#1}%
  \makename{\findname}{\lastname}%
  \ifboolexpr{ test {\ifdefequal{\currname}{\findname}} }%
  {\mkbibbold{#1}}{#1}%
}

Hi. This is not working for me with biber and xelatex. The code runs without errors. But the name is not bold.

Any idea?

\documentclass{scrartcl}
\usepackage{filecontents}
\begin{filecontents}{\jobname.bib}
@InProceedings{Paulicke2019a,
  author       = {Denny Paulicke and Christian Buhtz and Karsten Schwarz and Katrin Wedler and Dietrich Stoevesandt and Patrick Jahn},
  title        = {Technische Assistenzsysteme in der Pflegeausbildung},
  subtitle     = {Eine Online-Erhebung},
  eventtitle   = {20. Jahrestagung EbM-Netzwerk 2019 - EbM und digitale Transformation in der Medizin},
  eventdate    = {2019-03-22},
  venue        = {Berlin},
  organization = {Deutschen Netzwerks Evidenzbasierte Medizin e. V. (DNEbM)},
  publisher    = {German Medical Science GMS Publishing House},
  doi          = {10.3205/19ebm059},
  eprint       = {nbn:de:0183-19ebm0591},
  eprinttype   = {urn},
  year         = {2019},
}
\end{filecontents}

\usepackage{xltxtra}
\usepackage{microtype}

\input{boldauthorname}

\usepackage{csquotes}
\usepackage{polyglossia}
\setdefaultlanguage[spelling=new]{german}

\usepackage{hyperref}
\usepackage[
    backend=biber,
    style=apa,
    sortlocale=auto,
    language=german
]{biblatex}
\addbibresource{\jobname.bib}
\DeclareLanguageMapping{german}{german-apa}

\begin{document}
\boldname{Buhtz}{Christian}{C.}
\boldname{Christian}{Buhtz}{}
\nocite{*}
\printbibliography
\end{document}

Hey!

Sorry for the late response. I think you should change the order of first and last name of the authors to

author = {Paulicke, Denny and Buhtz, Christian and [...]}

Best regards