How fast is a macOS VM, and how small could it be?

https://eclecticlight.co/wp-content/uploads/2015/01/cropped-eclecticlightlogo-e1421784280911.png?w=200
A macOS VM on a Mac mini M4 Pro with macOS 26.4.1 runs at 98% of host speed, with GPU performance at 95%. A MacBook Neo can run a usable macOS VM with 2 virtual cores and 4 GB of memory.

Why does it take so long to release black fan versions?

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Show HN: Mljar Studio – local AI data analyst that saves analysis as notebooks

https://mljar.com/_next/static/media/ai-lab-home.0d08c1c6.webp
MLJAR Studio is a local AI data analyst and machine learning engineer that runs on your computer, providing private data analysis and insights. It includes an AI assistant that generates Python code, runs experiments, and improves notebooks for reproducible results.

Why are there both TMP and TEMP environment variables? (2015)

https://devblogs.microsoft.com/oldnewthing/wp-content/uploads/sites/38/2019/02/ShowCover.jpg
Two environment variables, TMP and TEMP, specify temporary file locations. Their usage varies by program, with some preferring TMP and others TEMP.

Show HN: DAC – open-source dashboard as code tool for agents and humans

https://raw.githubusercontent.com/bruin-data/dac/main/resources/dac_optimized.gif
DAC is a Dashboard-as-Code tool for defining and serving dashboards from YAML and TSX. It supports major databases and generates SQL via a built-in semantic layer.

Show HN: Browser-based light pollution simulator using real photometric data

Interactive light pollution analysis with photometric data

Ti-84 Evo

https://education.ti.com/-/media/ti/education/images/products/product-details/graphing/84-series/84-evo-shared/overview-evo-animated-screen-math-tools-v2.gif?rev=3e5c20f1-f86c-4050-9cb5-9230c63a8684&la=en&h=420&w=480&hash=C7678842D23A4F35210353A5A2B4B4AF
The input is a JSON object containing a list of commands for a text editor. The commands include editing text, formatting options, and inserting links and images.

Show HN: Piruetas – A self-hosted diary app I built for my girlfriend

https://piruet.app/static/img/logo-alpha-square.png
services: piruetas: image: forgejo.patilla.es/patillacode/piruetas:latest ports: - "8000:8000" volumes: - ./data:/data environment: # generate with: openssl rand -hex 32 SECRET_KEY: change-me-to-a-random-string ADMIN_USERNAME: admin ADMIN_PASSWORD: changeme SECURE_COOKIES: "false" # set to "true" if serving over HTTPS REGISTRATION_OPEN: "false" # set to ...

SKILL.make: Makefile Styled Skill File

https://opengraph.githubassets.com/fad7a5919b3fa928fcdf3fd22543f814c4ea578557c31286290a21947482c94b/Teaonly/SKILL.make
SKILL.make brings structured logic to Agent Skills, reducing SKILL file size by ~15% and improving readability. It uses a Target: Dependency + Recipe model for strict execution order and is highly composable.

The USB Situation

https://randsinrepose.com/wp-content/uploads/2026/04/usb-situation.jpg
I use a MacBook Pro with a Studio Display, connecting via a braided cable that handles video, power, and other Display connections. The cable's speed is limited by the port type, not the cable itself, so I recommend using a Thunderbolt 5 cable for faster speeds.

Show HN: Filling PDF forms with AI using client-side tool calling

https://cdn.simplepdf.com/simple-pdf/assets/common/logo-white.png
Public demo. Your chat messages leave your device and are sent to the selected AI provider. Use sample data only. Edit, fill, and understand PDFs by chatting with them.Learn more about SimplePDF Copilot

Bitmap and tilemap generation from a single example

https://raw.githubusercontent.com/mxgmn/WaveFunctionCollapse/master/images/wfc.png
The Wave Function Collapse (WFC) algorithm is a texture synthesis method that generates patterns by iteratively collapsing superpositions of pixels into definite states, ensuring the output contains only patterns present in the input. WFC has been implemented in various programming languages and has been used in game development, level generation, and other applications, with many variations ...

Artemis II Photo Timeline

https://artemistimeline.com/web/9608627.jpg
An interactive photo timeline of NASA's Artemis II mission — scrub through every crew moment, lunar flyby shot, and audio clip from April 1–10, 2026.

New research suggests people can communicate and practice skills while dreaming

https://media.newyorker.com/photos/69f38c2c92c2d134aec145ec/2:2/w_2560%2Cc_limit/image2%2520(4).jpeg
Scientists have been studying sleep learning, where people learn new information while asleep, and found promising results, but early studies were flawed. Recent research has shown that sleep can influence behavior and learning, with some people able to solve puzzles and remember information after waking.

A Gopher Meets a Crab

https://miren.dev/gopher-crab-chat-ui.png
The author, a Go developer, tried Rust for the first time and built a chat server with the help of a Rust IDE. They found Rust's exhaustive enums and ? operator useful but struggled with implicit exits and dense syntax.

Dotcl: Common Lisp Implementation on .NET

https://opengraph.githubassets.com/2cd9878641542edfe78a122650037e287c09c70d584f7d68175a272782f9bfe4/dotcl/dotcl
dotcl is a Common Lisp implementation on .NET that runs on Windows, macOS, and Linux. It embeds Lisp in .NET applications and allows writing .NET code in Lisp.

Ask.com has closed

IAC is discontinuing its search business including Ask.com after 25 years. Ask.com officially closed on May 1, 2026, thanking users for their loyalty and trust.

To Restore an Island Paradise, Add Fungi

https://yale-threesixty.transforms.svdcdn.com/production/Palmyra-Atoll_USFWS.jpg?w=400&auto=compress%2Cformat&fit=clip&dm=1777370036&s=bca8540c1ea43d9e372f4baeda9e754e
Conservationists on Palmyra Atoll are working to restore native wildlife by removing invasive palm trees and introducing native fungi. Researchers found rare mycorrhizal fungi that could help supply nutrients to Pisonia trees and boost seedling growth.

K3k: Kubernetes in Kubernetes

https://opengraph.githubassets.com/8cdc79e3605f7970225f72e2e61b4323cfa83c7d80371e43c543dbeb6328cbad/rancher/k3k
K3k is a tool that creates and manages isolated K3s clusters within a Kubernetes environment, offering efficient multi-tenancy and resource isolation. It provides both shared and virtual modes for optimized resource utilization and complete isolation.

CollectWise (YC F24) Is Hiring

https://bookface-images.s3.us-west-2.amazonaws.com/logos/a5be02a3378f664e1f80f2a84997514d00f9fc1f.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=ASIAQC4NIECAKS2NGTZR%2F20260502%2Fus-west-2%2Fs3%2Faws4_request&X-Amz-Date=20260502T044705Z&X-Amz-Expires=3600&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEG0aCXVzLXdlc3QtMiJHMEUCIAMI3cfIMsm0%2Fte%2FMckDxTL%2Bofj9hrh2VOPH6TPR8EKbAiEA0I191aErypki%2FKjzEuTYC0XVeCd3sdc%2F%2BqH4o2UquCgq5QMINhAAGgwwMDYyMDE4MTEwNzIiDDI%2B4r1amFYx66m9mSrCA1nFHyQ6wL6hVlcbslYrOcOroUoPPyIjh75cEYKBFbSKiPIla1KxNGU6kjeHX8El0wKgMvDXbPeF8vRIbprYECxP4J7x6Olr78FU9GZ71dtN3jb44gP%2BMYSfaL7oabV3QIiynVNuq0lyDo07IQXq7cyPe7Vmp%2FRCqUdT%2Fab6vfhICBJlDD%2Fy%2FcNXzjC7l%2BjcNhJ%2BJKlkhtuZcLvqSUzajhO3JdOENWURUxfqBmpEcRSzDthMTSrT5ZsFyyLJeRbhiXEHjU3VlhFiq6sXi5WYh635UTSiFwPJQEpGDsfR8rEZ28m3AFvsZiAaR3Ex2mAu8%2FBTfDiPtk8GO9UDoIa7mDmy9vC9a2ZCraRhIG3lXhnedVnp%2BF6EFaSPHc1rKfiI7VXP4GUli8%2FPe5mJoE2qb6iQyJ8B1X6EIlSxynUrxJ5NplnnrhSAB%2B7eBkB3r8DPUAmtCmtphZ%2BxHAVnnQRpiN%2BreQ3RogsTMMaZJck1ygCjksMgu%2B6HaLMqN9FmJu%2BJW14WM03VZBy01m%2Fm3qJbEoROvYApqODKwpmsw7tUA2S6Vrkp819BD3y9XmAXZV1FakQZ6HIInQN%2FefIZzBDCGQP0RjDngNbPBjqlAXjJROpI8o%2FoLTNeo2KLJYFwonv91xUDTXb7enw3UFRUvR%2FvS7pVMlICVBF9V9jvYIx%2BP9LSnh%2FhgKV46oREpk3x4PhPaute7pSucZaSzBIDo0IadkvwAFrbJzO1walYQSm68AUDyIsIs3Fs9qFaJkLOY0%2FoEFtNuNGl8AUNpgSPb9%2FYXKxptIV1nY5qYuYgh%2FoFiONFf6pU5o4X%2BpIvs0u7YM2%2Fyg%3D%3D&X-Amz-SignedHeaders=host&X-Amz-Signature=614ac84d9646667ec99bbede02aa8481d5ab0c8f5dcc690c7042274afdb5a4a9
CollectWise is a Y Combinator-backed startup using AI to automate debt collection. They're hiring a Senior Forward Deployed Engineer to lead client implementations and reach $10 million in revenue within a year.

LFM2-24B-A2B: Scaling Up the LFM2 Architecture

https://cdn.prod.website-files.com/67cb8aa6e9184b6e44813189/699c94edd6c639c7489d4b4d_MoE%20(1).png
LFM2-24B-A2B is a large language model with 24 billion parameters, released in an early checkpoint, and is deployable across cloud and edge environments. It shows consistent quality gains on standard benchmarks and has favorable throughput scaling, making it suitable for on-device deployment.

Show HN: Large Scale Article Extract of Newspapers 1730s-1960s

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I'm Peter Roberts, immigration attorney who does work for YC and startups. AMA

The user discusses various US immigration topics including the new $100k H1B fee, N400 application delays, L1 visa changes, and green card application challenges. They also mention the difficulties of sponsoring H1-B workers for permanent status and the increasing RFE and denial rates for certain green card applications.

Lib0xc: A set of C standard library-adjacent APIs for safer systems programming

https://opengraph.githubassets.com/2c64935df94582561c7e37aaec96ca8dc23a30a38d207948e200f8457546e6a2/microsoft/lib0xc
lib0xc is a C library that aims to make systems programming safer by providing safer APIs and utilities. It uses the C preprocessor to expose its API surface and leans heavily on clang bounds safety extensions.

Ask HN: Who is hiring? (May 2026)

Here are the job postings summarized in 2 concise English sentences each, not exceeding 200 characters:

Eka’s robotic claw feels like we're approaching a ChatGPT moment

https://media.wired.com/photos/69f11c49423c2e71c99af00a/master/w_1600%2Cc_limit/20260320-wired-eka-robotics-1221.jpg
A startup called Eka is developing a robot with advanced dexterity, allowing it to perform tasks like screwing in a light bulb and handling food. The robot's creators believe their approach could revolutionize robotics and enable robots to work in various settings.

A report on burnout in open source software communities (2025) [pdf]

Open source maintainers face burnout due to lack of payment and unsustainable expectations. This leads to a crisis in the open source community, affecting mental health and self-worth.

Show HN: Stop playing my matchstick puzzles, start building your own in seconds

Free online matchstick puzzle game with guaranteed solutions. Solve challenges that get harder as you progress. Create and share your own custom puzzles.

DeepSeek V4–almost on the frontier, a fraction of the price

https://static.simonwillison.net/static/2026/deepseek-v4-flash.png
DeepSeek released V4 series models, DeepSeek-V4-Pro and DeepSeek-V4-Flash, with 1 million token context Mixture of Experts. They are priced at $0.14/million tokens input and $0.28/million tokens output for Flash, and $1.74/million input and $3.48/million output for Pro.

Apocalypse Early Warning System

The site tracks business jets using FAA registry data and ADS-B Exchange heatmap files, comparing current airborne counts to historical baselines for anomalies. It estimates max people on board by mapping aircraft models to published capacities and scaling unknowns by average.