# On niv running on mac, which branch should I use to update to 21.11? I can't find release-21.11-darwin branch on nixpkgs

**URL:** https://discourse.nixos.org/t/on-niv-running-on-mac-which-branch-should-i-use-to-update-to-21-11-i-cant-find-release-21-11-darwin-branch-on-nixpkgs/16446
**Category:** Help
**Created:** [December 6, 2021, 1:37am UTC](https://discourse.nixos.org/t/on-niv-running-on-mac-which-branch-should-i-use-to-update-to-21-11-i-cant-find-release-21-11-darwin-branch-on-nixpkgs/16446 "2021-12-06T01:37:05Z")
**Posts on this page:** 1
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### Author: ![rofrol](https://discourse.nixos.org/user_avatar/discourse.nixos.org/rofrol/32/5018_2.png) [@rofrol](https://discourse.nixos.org/u/rofrol)
#### Post date: [December 6, 2021, 1:45am UTC](https://discourse.nixos.org/t/on-niv-running-on-mac-which-branch-should-i-use-to-update-to-21-11-i-cant-find-release-21-11-darwin-branch-on-nixpkgs/16446/2 "2021-12-06T01:45:24Z")

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> [@Why there are branches nixos-21.05 and release-21.05?](https://discourse.nixos.org/t/why-there-are-branches-nixos-21-05-and-release-21-05/16116/2):
>
> I have found this: Which channel is right for me? You probably want to use the current stable, ie: nixos-18.03. nixos-18.03 comes from the release-18.03 branch on GitHub. It maintains some package version stability over its six-month life, providing better guarantees that your system will keep working without major changes for the life of the release. The stable branch also gets timely security patches delivered through channels. The channels beginning with the nixos- prefix are thoroughly …

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