feat(installer): support macOS dev installs

Signed-off-by: Drew Newberry <anewberry@nvidia.com>

Author: drew

architecture/custom-vm-runtime.md

@@ -323,8 +323,8 @@ only for the kernel build).
 
 macOS driver binaries produced via osxcross are not codesigned. Development
 builds are signed automatically by `tasks/scripts/gateway-vm.sh`
-(registered as `mise run gateway:vm`); a packaged release needs signing in
-CI.
+(registered as `mise run gateway:vm`) and by `install-dev.sh` when it installs
+the Apple Silicon development tarballs. A packaged release needs signing in CI.
 
 ## Rollout Strategy