A shared view
Aggregate Apex and GHL equipment, including GHL gear without supported APIs, on your Mac.
Sentinel for Mac · aquarium awareness
One desktop.
A clearer vision.
A completed personal Mac app, not available for others to use, that brings Apex and GHL equipment—including devices without supported APIs—into one view. Stronger alarming and Home Assistant integration make that information more useful, helping you understand what needs attention.
Complete and functioning · personal project only
Sentinel for Mac is my personal project. It is not available for others to use.
01Apex + GHL aggregation
02Stronger alarming
03Home Assistant integration
04Better aquarium awareness
Why I built it
Information is useful.
Awareness is the win.
I wanted a clearer picture of my aquarium without leaving useful equipment outside the conversation just because it lacked a supported API.
Sentinel for Mac brings Apex and GHL equipment into one desktop view. The big wins were alarming and Home Assistant integration: information from different equipment becomes easier to notice and more useful across the wider setup.
This is a completed, functioning personal project in my own setup, not available for others to use. It reflects the Sentinel approach: use familiar tools, improve awareness and get more from equipment you already own.
What it adds
See together. Notice sooner. Connect more.
Alarming that matters
Bring alarming into the shared picture so important aquarium conditions can get your attention.
Home Assistant integration
Connect the aquarium information with Home Assistant and the broader view of your home.
Questions & answers
A completed awareness project.
Is it working?
Yes. Sentinel for Mac is complete and functioning in my own setup, with Apex and GHL aggregation, alarming and Home Assistant integration.
Does every GHL or Apex device work?
The project includes GHL equipment without supported APIs and Apex. That does not establish support for every model, firmware revision or setup. A public compatibility list is not published here.
Can I use Sentinel for Mac?
No. Sentinel for Mac is a personal project and is not available for others to use. This page shares what I built and the awareness it adds to my own setup; it is not a product offer, download or waitlist.
How is it different from Sentinel Alarm?
Sentinel for Mac is a desktop aggregation and awareness app with alarming and Home Assistant integration. Sentinel Alarm is the separate hands-on Apex alarm device project using user-supplied electronics.