Because portable versions are created by anonymous "crackers" and distributed via torrent sites or file-lockers, they are prime vectors for malware.
Copy that installer to a high-speed USB 3.2 Gen 2 SSD (Not a cheap flash drive – C4D requires fast read/write speeds). Also copy your user preferences folder (Library/Preferences/Maxon or AppData/Roaming/Maxon) to the USB. maxon cinema 4d r26 portable