alt.hn

4/16/2026 at 12:19:40 AM

Agent - Native Mac OS X coding ide/harness

 https://github.com/macOS26/Agent

by jv22222

4/16/2026 at 9:42:56 AM

> Securely runs root-level commands via a dedicated macOS Launch Daemon

lovely.

by ammmir

4/18/2026 at 4:57:11 PM

The Launch Daemon is 100% optional and can better turned off along with its tools. It's there to help users install things like software updates or disk commands that required elevated access.

It operates under least priv. And the user must approve the Launch Agent (runs under use space, same as running locally within the App), and the Launch Daemon. There are 4 levels involved and the Daemon is last on the list and is rarely used. The user can just disable it and its tools get disabled as well. The LLM won't be able to use it in that state.

What gets used: 1. AppleScript/Osascript TCC, runs within the app, user approve each app being automated 2. AgentScript/Swift Dylibs/ScriptingBridge, same TCC runs within the app 3. Local shell scripting - backup if the user's Launch Agent (user space is down 4. Launch Agent (runs in the user space), primary for running shell commands. 5. Launch Daemon, software updates, etc. Anything the previous 4 layers can't handle. Rarely ever used. can be turned off by the user. I have used it to access the security of the Mac itself and it was surprisingly accurate and thorough.

by macOS26

4/17/2026 at 9:57:24 PM

It’s a bit concerning that AI slop made by bots is getting 80 upvotes in here.

by ricardobeat

4/16/2026 at 3:07:03 PM

A non-Apple entity using "macOS26" as their organization name? Are you trying to trigger everyone's corporate phishing training?

by tylermw

4/18/2026 at 2:37:12 PM

Technically not an organization name. It's a username and a domain name, macOS26.app.

If  had a concern they had months ahead of time reserve

I'm also the creator of BigMac, that supported unsupported macOS installs on old Mac Pro 2008-2012 hardware. Neither Apple nor McD's chimed in.

by macOS26

4/18/2026 at 11:12:21 PM

Funny on the phishing, noted.

by macOS26

4/18/2026 at 3:54:08 AM

For those wondering about Priv. Agent is built on least priv. It will Run TCC related tasks locally and each app that is being automated required consent from the user. same with automating Safari + user must check a few boxes in Developer tools for Safari. Then there's shell scripting which the preferred route is the Launch Agent which the user approves along with the Launch Daemon. If the Launch Agent is not available, shell scripts run locally. AgentScripts within in swift also run locally in the app.

Anything priv. runs through the Launch Daemon. This is mostly used for software updates. Lately when creating a dmg using hdiutil, I have seen Agent securely ask for the the password and not use the launch daemon.

The Daemon was created first as a test to see what would happen if an LLM had access to one. And under that mode it knew about 50 things it could run as an administrator of the computer. It was never ran in that state. and its 3-4 layers of access were created.

The user can turn of the Launch Daemon and when this happens not only us the Daemon turned off, so are is access to the Launch Daemon tool. This model is used all over Agent! The user can turn off anything. I do plan to harden the Launch Agent and Launch Daemon on off access with Local Authentication and later a Pass-Key to prevent Agent! from turning it back on via things like Accessibility.

by macOS26

4/18/2026 at 3:43:45 AM

Hello!

I am the creator of Agent! macOS26.4+, and many won't know this but I have been coding AI apps and related tools from scratch for the past 3 years. I wanted to build something specifically for Mac but at an Agentic level.

I'll remove the stars and forks from the banners. The ribbons are emojois. To raise awareness, I have stage 2 (T2) bladder Cancer. I have been extremely sick the past two weeks. Agent was created a month ago. But most of the work that was done in the past 3 years has been applied to Agent.

If you want to be completely save, Agent does run on a macOS VM, but without any help from Apple Intelligence which runs various things locally. Some parts of Apple AI like Triage/Mediator are experimental.

I chose macOS26 because no one else claimed it and wanted to make it clear what version of macOS the user needed. You'd be surprised how many people still asked if it ran on 10.14 Mojave.

by macOS26

4/16/2026 at 5:24:19 AM

The XPC architecture is the right call for privilege separation … it’s what makes sandboxing trustworthy on macOS rather than just advisory. I’m really curious how it handles the trust boundary between LLM responses and the XPC service layer. The most obvious attack surface is prompt injection via a document the agent reads, which then instructs it to do something in Safari or Messages that the user wouldn’t normally sanction. XPC gives you OS-enforced process isolation but doesn’t help you if the privileged process is faithfully executing a poisoned instruction.

What’s the current model for distinguishing user intent from “content the agent read”? Is it purely the system prompt guidance, or is there something structural?

Thanks for posting.

by foreman_

4/18/2026 at 10:21:22 PM

A little of both. System prompt guidance with programming structured flow undearneath the hood. May add more guardrails but the more you put in place the more the AI/LLM will find another way.

I've locked down Agent! from one of its processes and run it in a VM and it tried everything it could to break out. It couldn't but it was fun watching it trying to resign compiled Dylibs, the Launch Agents / Daemons and itself. Because of SMAppService, it lost connection with its background process and once it basically hosed itself, I ended the experiment.

by macOS26

4/18/2026 at 4:19:09 AM

If anyone wants to know. My previous usernames are: 2020s SuperBox64, 2010s StarPlayrX, 2000s StarPlayr, 90s GoodTime, 80s Mirage, 80s WildFyre.

Been using Macs since 1984. Mac OS X since 2000, beta 1.

I really didn't think about humanizing the name. I just felt this flowed really well https://agent.macOS26.app and https://github.com/macOS26/agent

I do want to thank those who have taken the time to look at the app and who have left feedback!

by macOS26

4/16/2026 at 6:45:12 AM

Off topic, but I sincerely ask: am I the only one that is disturbed by the use of the term "Mac OS X" to refer to modern versions of the OS that is currently called "macOS"? (and not MacOS either)

I mean, the name was changed ten years ago...

by gignico

4/16/2026 at 10:39:21 AM

It wasn’t even “Mac OS X” ten years ago, but “OS X”. “Mac OS X” was 15 years ago.

by Hamuko

4/18/2026 at 2:50:25 PM

I don't think Mac from Mac OS X, was officially dropped, I think was like Xerox, we just stopped Mac from it an called it "OS X" even thought X stood for 10 from 10.0 to 10.15. This is also why Microsoft also tried the Windows 10 game and alluded to never having Windows 11 which obviously changed.

Personally, I wish Apple would stop creating a new OS yearly. Most features users use were born in System 7/8/9 days.

by macOS26

4/16/2026 at 7:55:23 AM

Looks like the submitter used the wrong term - the actual link uses "macOS".

But to answer the question: Yes! I opened thinking it was going to be some awesome Leopard or Lion app.

I miss the name, mostly because the OS was interesting and fun in those days and boring and dreary and buggy and low contrast and poor UX and squircles and flat colours if it even has colours now.

by vintagedave

4/17/2026 at 6:46:48 PM

Recently I tried a similar project: Fazm. It's also implemented in Swift, just like Agent here. The Fazm feature set is similar with with main differences are it's focused more on Claude exclusively. https://github.com/mediar-ai/fazm

by evanjrowley

4/19/2026 at 4:58:55 AM

Agent! supports over 17+ LLM providers including local and remote LLMs.

by macOS26

4/16/2026 at 9:07:13 AM

So…

What is a harness? People have been talking about it and couldn’t glean what it is

by mettamage

4/16/2026 at 2:11:59 PM

AI models on their own are raw, undirected, and inherently probabilistic. A "harness" acts as a control layer wrapped around the model, designed to steer it toward deterministic outcomes. It achieves this by equipping the model with actionable tools like web search or file I/O, and by orchestrating an evaluation loop that runs until an acceptable result is produced. (various analogies work here - an astronaut and a space suit, a rocket and the launch pad/mission control, okay I'm out of analogies that aren't car engines)

You can see this in practice by looking at the leaked Claude Code source code. It is a harness around Anthropic's model built for writing code. It relies on heavily engineered (and sometimes brittle) steering mechanisms. These range from highly specific situational prompts to deterministic, hard-coded logic that executes based on the model's output.

Getting a harness right is incredibly hard and feels like whack-a-mole at times.

by jayphen

4/18/2026 at 4:48:39 PM

I can totally agree on the harness part. When I first set out to create a Cursor killer nearly 3 years ago, I built LLM tools, but when I didn't know then has I tried to wrap the LLM's brain around the tools when it needed to be the other way around.

Looks me off an on three years to realize I was doing it backwards. Agent was originally born after I re-wrote CloneTool, a more generic Disk Cloning too with an SMAppService Launch Daemon.

After I completed CloneTool, I was like mmmmm what is I connected an LLM to the Daemon? It rattled of 50 things it could do and it had no knowledge of this anywhere in the harness, system prompt or tools. It simply had figured out its environment on its own.

I never ran Agent under that scenario it definitely has a hardness now. And yes getting the hardness right is a number one challenge and once you do get it working good with most LLMs out of the box, you try not to change it because that sweet spot is hard to come by. Not to say it never gets tweaked but the further in you go, the more you chringe on a change that may break it.

by macOS26

4/16/2026 at 9:44:15 AM

A while loop, some prompts basically amounting to "this is how you format a system call" and "make no mistakes", there's also a regex + executor for detecting and executing system calls.

by miningape

4/16/2026 at 9:48:28 AM

you forgot the memory model. Which is an absolutely essential and hard to design part of the agent.

by bsaul

4/16/2026 at 10:15:30 AM

and occasionally, UI prompts with QA.

by cyanydeez

4/16/2026 at 11:14:35 AM

Memory model? I would not want agent to remember previous conversations.

by lostmsu

4/16/2026 at 1:14:45 PM

Ever? You would not want to accumulate any useful context at all?

by pohl

4/16/2026 at 4:08:40 PM

Maybe in the future but with the current models I found the constantly accessible memories to be an impediment. I don't want models to record and repeat mistakes or suboptimal strategies.

by lostmsu

4/16/2026 at 5:50:04 PM

Gemini (just in the browser) has been really bad about conflating a bunch of similar projects. It remembers "oh, you have a home server that does XYZ", so my new home server that's doing ZYX instead must be the same system.

by QuercusMax

4/16/2026 at 3:42:13 AM

Would love to be able to use this with my Claude Max Plan subscription ($100/month)... not going to pay with an API Key which burns through tokens way faster. Might try it for the local Apple Intelligence and accessibility to drive local apps tho.

by moonlighter

4/18/2026 at 3:19:02 PM

Latest version of Agent supports OAuth bearer tokens with Claude Code, via "claude setup-token", command from Claude.

And there are over 17+ LLM Providers within Agent including local and cloud based solutions offered by Zai, HuggingFace, Ollama, etc.

I agree on the token part. Until I incorporated Oauth for CC, I used mostly Zai GLM5-1 and used Ollama and Huggingface as fallback which is a new feature called "Fallback chains".

by macOS26

4/16/2026 at 10:16:38 AM

Anthropic don't allow that unfortunately

by anentropic

4/19/2026 at 1:39:13 AM

third party apps are supported via the setup token.

'claude setup-token'

by macOS26

4/16/2026 at 10:16:06 AM

talk to claude.

by cyanydeez

4/19/2026 at 5:00:18 AM

/extra-usage

by macOS26

4/16/2026 at 11:34:18 AM

[dead]

by sayYayToLife

4/16/2026 at 9:10:26 AM

Is this "macos26" official Apple github account?

by jsomedon

4/16/2026 at 9:38:54 AM

Nope, looks like someone's angling for some sweet domain parking money.

Or a lawsuit, given macOS is a trademark.

by DavidPiper

4/19/2026 at 1:41:28 AM

Apple had plenty of time to reserve both macOS26 on Github and macOS26.app. They can send a C&D when they want to. And I will gladly change it.

by macOS26

4/19/2026 at 1:44:01 AM

I was surprised it was even available.

The goal to emphasize that it was built for macOS26 users.

The original website is https://agent.macOS26.app and it clear states it's for macOS26 even thought I still get users asking if it works with El Cap a tan.

by macOS26

4/16/2026 at 3:47:32 AM

> Our Founder! of this project is battling cancer. Your Stars and Forks are appreciated.

I'm sorry to hear this, but I'm also surprised that this is the first thing I learnt about this project, and that it is written in the third person. It detracts from the project.

by danpalmer

4/16/2026 at 5:16:53 AM

I don't have a problem with mentioning cancer, but they should've mentioned which cancer to raise awareness and help others. The ribbon icon is gold which means pediatric/childhood cancer?

Asking for stars and forks is where it gets weird. I understand a crowdfunding program but how is this going to help?

Makes it even weirder that this is a completely anonymous, we don't know who works on it, and actually the project pretends to be authored by "AI". look at commit history and contributors

I don't want to be cynical here, my dad was diagnosed with cancer too but this just feels like some LLM was given a prompt to maximize stars and forks and this is how that went. I am very sorry to say this.

by throwaway290

4/16/2026 at 8:59:52 AM

Although not disclosed on this page, the author's name is mentioned on their other projects[0].

> Our founder, Todd Bruss, is currently battling Cancer. Through it all, he continues to pour his heart into InkPen. Your support and encouragement mean the world.

The author has posted about their project on LinkedIn as well[1].

[0] https://inkpen.io/ [1] https://www.linkedin.com/in/principal-software-engineer-swif...

by calmingsolitude

4/16/2026 at 9:45:41 AM

OK, I take it back. What can I say, even knowing he is working on this LLM stuff that's becoming the curse of humanity I still wish him beat cancer.

by throwaway290

4/19/2026 at 1:50:22 AM

:)

by macOS26

4/16/2026 at 9:21:27 AM

Open-source maintainers don't owe anyone perfectly-manicured marketing copy on their landing pages. Honestly, the fact that is the first thing you learn humanises the username behind the keyboard

by swiftcoder

4/16/2026 at 9:50:40 AM

> the fact that is the first thing you learn humanises the username behind the keyboard

The username is macOS26. The name is "Agent!". As in "Agentic AI for your entire Mac Desktop". All commits are made by this entity.

Until someone here told me there is a real guy behind it I sincerely gotta say, it looks like there's no human behind the keyboard and actually there's no keyboard at all.

Combined with cancer message on top it made me think some LLM "agent" is trying different tricks because it was prompted to achieve maximum stars and forks. I feel shitty for saying this but how not to be cynical because literally that's what we degraded to thanks to "ai".

by throwaway290

4/16/2026 at 9:57:40 AM

> Combined with cancer message on top it made me think some LLM "agent" is trying different tricks because it was prompted to achieve maximum stars and forks. I feel shitty for saying this but how not to be cynical because literally that's what we degraded to thanks to "ai".

AI might increase the volume of shitty things on the internet, but it's not like GitHub accounts weren't anonymous before AI, and it's not like people weren't using scammy tactics to boost their star count before AI.

If the fear of AI turn us into worse people in our interactions, that's kind of on us, not AI

by swiftcoder

4/16/2026 at 5:51:49 PM

An anonymous account isn't the same as bot account. Number of obvious bot accounts jumped 1000% in the last 4 years or so.

by throwaway290

4/19/2026 at 1:45:02 AM

Thanks! :)

by macOS26

4/19/2026 at 5:03:46 AM

I honestly don't think anyone starred, watched or forked it because it was a person with cancer. They starred it because it's a good app. One that is missing on macOS.

Today, I used it to weed out hundreds of Linkedin "followings" with Safari. worked like a champ. It does very well at coding tasks too and automating Xcode builds.

by macOS26

4/16/2026 at 4:29:52 AM

What a crazy comment. The first clause of your first sentence was more than enough.

by mrcwinn

4/16/2026 at 4:44:18 AM

Imagine seeing a cancer announcement and thinking, 'This is bad for the branding.' Your lack of empathy is what’s actually detracting here.

by johannsg

4/18/2026 at 3:25:46 PM

I removed the Cancer banners. But I will tell you that I have physically gone through 2.5 weeks off hell. Chemo is no joke and I am 50% there. It gets tougher each time and the symptoms hit you in the middle of the week. And I also am getting booster shots that force white blood cells out of my bone marrow and it has severe side effects and all they can offer is over the counter Claritin.

I've had days of fevers, dehydration, nausea, vomiting and still holding down a day job. So please don't be offended by my diagnosis or saying that stars and forks mean the world because it kind of does.

by macOS26

4/18/2026 at 4:51:19 PM

Sorry I responded to the nested reply. no offense.

by macOS26

4/16/2026 at 6:38:59 AM

Emoji in the macOS menu bar, that's new.

by apparatur

4/16/2026 at 10:41:50 AM

[dead]

by maxbeech