https://community.graphisoft.com/t5/Installation-update/Slow-lagging-performance-while-drawing-a-wall-copy-past/m-p/282696#M29214 Read this topic, it talks about this same issue.<BR /> The primary suspect is the Antivirus software. Follow to instructions about making exceptions in the Antivirus software, see if that helps. Sun, 15 Apr 2018 22:12:02 GMT Laszlo Nagy 2018-04-15T22:12:02Z https://community.graphisoft.com/t5/Installation-update/Slow-lagging-performance-while-drawing-a-wall-copy-past/m-p/282695#M29213 <DIV class="actalk-migrated-content"><T>hello, <BR /> have problem drawing walls, computer lagging. re-installed Archicad 21, installed most recent update on my mac. very annoying<BR /> also same happens with copy past.<BR /> any help/advice will be appreciated. unfortunately cannot find specific solution for my problem.</T></DIV> Wed, 11 Apr 2018 23:24:14 GMT https://community.graphisoft.com/t5/Installation-update/Slow-lagging-performance-while-drawing-a-wall-copy-past/m-p/282695#M29213 Anonymous 2018-04-11T23:24:14Z https://community.graphisoft.com/t5/Installation-update/Slow-lagging-performance-while-drawing-a-wall-copy-past/m-p/282696#M29214 Read this topic, it talks about this same issue.<BR /> The primary suspect is the Antivirus software. Follow to instructions about making exceptions in the Antivirus software, see if that helps. Sun, 15 Apr 2018 22:12:02 GMT https://community.graphisoft.com/t5/Installation-update/Slow-lagging-performance-while-drawing-a-wall-copy-past/m-p/282696#M29214 Laszlo Nagy 2018-04-15T22:12:02Z