jaehwan02/ultracat

★ 15Audience · generalComplexity · 1/5Setup · easy

Mindmap

mindmap
  root((UltraCat))
    What it does
      System monitoring
      Fan control
      Sleep management
    Installation
      DMG download
      Drag to Applications
      Helper permission
    Features
      Auto updates
      Korean and English
      Menu bar access
    Audience
      Mac users
      General public

mindmap root((UltraCat)) What it does System monitoring Fan control Sleep management Installation DMG download Drag to Applications Helper permission Features Auto updates Korean and English Menu bar access Audience Mac users General public

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Things people build with this

USE CASE 1

Monitor your Mac's system status at a glance from the menu bar without launching a full app window.

USE CASE 2

Adjust fan speeds manually when your Mac runs hot during intensive tasks like video rendering.

USE CASE 3

Manage sleep settings to prevent your Mac from sleeping during long downloads or processing jobs.

USE CASE 4

Receive automatic app updates silently via the built-in Sparkle update framework.

Tech stack

macOSSparkle

Getting it running

Difficulty · easy Time to first run · 5min

Requires macOS 26.4 or later. Fan control needs a one-time background helper permission approval in System Settings, then an app restart.

In plain English

UltraCat is a small macOS utility that lives in the menu bar, the strip of icons in the top-right corner of the screen on a Mac. From there it lets you monitor your system status, adjust fan speeds, and manage sleep settings, all without opening a separate app window. This GitHub repository does not contain source code. The author uses it as a distribution point and update delivery channel. The actual application is a compiled macOS app available as a DMG file from the releases section. To install it, you download the DMG, open it, and drag the app into your Applications folder. Fan control and some power management features require an extra permission step. The first time you use those features, macOS will ask you to approve a background helper component in System Settings. After granting that permission, you quit and reopen the app for it to take effect. UltraCat checks for updates automatically using a tool called Sparkle, which is a standard update framework for macOS applications. The app supports both Korean and English interfaces. According to the README, it requires macOS 26.4 or later. The README is short and does not describe which specific system metrics are shown, what fan speed options are available, or what the sleep management controls include beyond confirming those features exist. Screenshots are included in the README but the description of what each panel does is left to the images.

Copy-paste prompts

Prompt 1

I installed UltraCat and the fan control feature is not working. Walk me through granting the background helper permission in System Settings and restarting the app.

Prompt 2

How do I configure UltraCat to show specific system metrics in the menu bar? What display options are available?

Prompt 3

I want to build a similar macOS menu bar utility. Explain how Sparkle automatic updates work and how the background helper permission model is structured.

Prompt 4

UltraCat is showing system metrics but I want to understand what each value means, explain what to look for in CPU, memory, and fan speed readings on a Mac.

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