A3. PostgreSQL is not supported for use with IUCLID 6. The only databases supported are JavaDB/Derby (free, as in no charge) and Oracle (commercial). For more information about software requirements please refer to the documentation section of this website.
A4. Tomcat is not supported for use with IUCLID 6. This is one of the major technical changes between IUCLID 5 and IUCLID 6. The Tomcat application server is replaced by GlassFish (version 3.1.2 or 4).
A5. Details of the operating systems tested and supported by ECHA are available on the system requirements page of the IUCLID website.
A6. Yes. IUCLID 6 Desktop is available for macOS from the download page of the IUCLID website.