diff --git a/doc/manual/src/installation/index.md b/doc/manual/src/installation/index.md
index dafdeb667..16a7f485a 100644
--- a/doc/manual/src/installation/index.md
+++ b/doc/manual/src/installation/index.md
@@ -14,6 +14,14 @@ 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
+> ```console
+> error: the user '_nixbld1' in the group 'nixbld' does not exist
+> ```
+> when running Nix commands, refer to GitHub issue [NixOS/nix#10892](https://github.com/NixOS/nix/issues/10892) for instructions to fix your installation without reinstalling.
+
 ```console
 $ bash <(curl -L https://nixos.org/nix/install) --daemon
 ```
diff --git a/doc/manual/src/installation/installing-binary.md b/doc/manual/src/installation/installing-binary.md
index 6a168ff3d..6a1a5ddca 100644
--- a/doc/manual/src/installation/installing-binary.md
+++ b/doc/manual/src/installation/installing-binary.md
@@ -1,5 +1,13 @@
 # Installing a Binary Distribution
 
+> **Updating to macOS 15 Sequoia**
+>
+> If you recently updated to macOS 15 Sequoia and are getting
+> ```console
+> error: the user '_nixbld1' in the group 'nixbld' does not exist
+> ```
+> when running Nix commands, refer to GitHub issue [NixOS/nix#10892](https://github.com/NixOS/nix/issues/10892) for instructions to fix your installation without reinstalling.
+
 To install the latest version Nix, run the following command:
 
 ```console
diff --git a/doc/manual/src/installation/uninstall.md b/doc/manual/src/installation/uninstall.md
index bb21af24e..429fcae46 100644
--- a/doc/manual/src/installation/uninstall.md
+++ b/doc/manual/src/installation/uninstall.md
@@ -43,6 +43,14 @@ which you may remove.
 
 ### macOS
 
+> **Updating to macOS 15 Sequoia**
+>
+> If you recently updated to macOS 15 Sequoia and are getting
+> ```console
+> error: the user '_nixbld1' in the group 'nixbld' does not exist
+> ```
+> when running Nix commands, refer to GitHub issue [NixOS/nix#10892](https://github.com/NixOS/nix/issues/10892) for instructions to fix your installation without reinstalling.
+
 1. If system-wide shell initialisation files haven't been altered since installing Nix, use the backups made by the installer:
 
    ```console