Gas Mask
Gas Mask is a hosts file manager for macOS that allows users to quickly create, edit, and switch between multiple hosts file configurations. It is commonly used by developers, system administrators, and advanced users who need to manage local DNS entries for development environments, testing, or network troubleshooting. The app provides a simple graphical interface to manage hosts files that would otherwise require terminal access and manual text editing.
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1 suggestionGas Mask has been abandoned by its developer — the latest version (0.8.6) was released in 2018 and the app is no longer supported. More critically, the current build is 64-bit Intel-only (x86-64) with no native Apple Silicon support. The app continues to run under Rosetta 2 on M-series Macs today, but Apple is removing Rosetta in macOS 28 (September 2028), after which this app will stop launching entirely. Because the developer is inactive, a native update is unlikely. The GitHub repository (github.com/psagmiller/gasmask) contains the source code, so technically-minded users could compile a native version themselves, but for most users the practical path forward is to migrate to a maintained alternative. Hostbuddy, another macOS hosts file manager available on the App Store, offers similar functionality and runs natively on Apple Silicon. For command-line oriented users, managing the hosts file directly via terminal (nano /etc/hosts) or using command-line tools like dnsmasq is another option.
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