IPSW Portal

Choose aProduct→Choose aPlatform→Choose aVersion→ClickDownload

Download 13.3.1 (17K5775c) for Apple TV 4 (2015)

Version:	13.3.1
Build:	17K5775c
Signed:	No
Size:	1.63 GB
Release Date:	2019-12-17 18:16:03
Upload Date:	2019-12-13 16:12:03
Release Type:	Beta

Secure download directly from Apple's servers