It sounds like a problem with your internet connection and/or having antivirus software running during the download and installation.
For the installer to not actually do anything sounds like either you did not download from myarchicad.com ... or your antivirus prevented a proper installation.
One of the forum moderators • AC 26 USA and earlier • macOS Ventura 13.2.1, iMac Pro 10-Core, Radeon Pro Vega 64