Classroom Presentation Tool (CPT) Troubleshooting I am using one of your programs and don’t have access to the Classroom Presentation ToolIf you have adopted one of our programs and don’t have access to the Classroom Presentation Tool (CPT), please contact your local sales representative, or contact support and let us know what you need. We will get back to you as soon as we can. Cannot Install CPT in Mac OS 10.15 Catalina or LaterClassroom Presentation Tool might not be able to install on iOS Mac Catalina (10.15) or later due to Apple’s third party developer block. In these Mac operating systems, an app fails to install because it hasn’t been notarized or is from an developer not identified by Apple. Limitations of CPT on CD/DVD formatsOlder products delivered on CD/DVD have certain limitations. Cannot Install CPT CD-ROMYou might receive an error message when you attempt to install the Classroom Presentation Tool on a CD-ROM.