Choose aProduct→Choose aPlatform→Choose aVersion→ClickDownload

Download 11.2.3 (20D91) for MacBook Air (M1, Late 2020)

Version:	11.2.3
Build:	20D91
Signed:	Yes
Size:	12.77 GB
Release Date:	2021-03-08 18:14:48
Upload Date:	2021-03-03 22:02:51
SHA1:	47409e45ec6d9b6a15d9a49563572914f222104e
MD5:	21c98b937bce0285abde8b39d1069409
SHA256:	3873efdc08c71af06b8d5ad1d2fda0d509746cc29e568e90732ccbe614af5a9f

Secure download directly from Apple's servers

IPSW Portal