OS 10.12..6

I have been trying to download perian from 4 different sources but I get a notice saying it can't be opened because it is from an unidentified developer.

Anyone know of an acceptable developer?


jaybass

OS 13.6.6 iMac (Retina 5K, 27", 2017, 3.4 GHz Intel Core i5, 24 GB RAM, 2400 MHz DDR4. SuperDuper. 1 TB Lacie HD