The impending release of macOS 15 Sequoia will break many existing nix installs on macOS, which may lead to an increased number of people who are looking to try to reinstall Nix without noticing the open/pinned issue (#10892) that explains the problem and outlines how to migrate existing installs. These admonitions are a short-term measure until we are over the hump and support volumes dwindle.
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Installation
This section describes how to install and configure Nix for first-time use.
The current recommended option on Linux and MacOS is multi-user.
Multi-user
This installation offers better sharing, improved isolation, and more security over a single user installation.
This option requires either:
- Linux running systemd, with SELinux disabled
- MacOS
Updating to macOS 15 Sequoia
If you recently updated to macOS 15 Sequoia and are getting
error: the user '_nixbld1' in the group 'nixbld' does not exist
when running Nix commands, refer to GitHub issue NixOS/nix#10892 for instructions to fix your installation without reinstalling.
$ bash <(curl -L https://nixos.org/nix/install) --daemon
Single-user
Single-user is not supported on Mac.
This installation has less requirements than the multi-user install, however it cannot offer equivalent sharing, isolation, or security.
This option is suitable for systems without systemd.
$ bash <(curl -L https://nixos.org/nix/install) --no-daemon
Distributions
The Nix community maintains installers for several distributions.
They can be found in the nix-community/nix-installers
repository.