Oxygen Not Included 744825 — Mac build

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Download for macOS (1.4 GB) Earlier tested builds

oxygen not included torrent — app at launch — Screens from this build, click one to enlarge

Oxygen Not Included interface, screen 2 — Screens from this build, click one to enlarge

If you manage software or build things from parts, you already know the loop: start small, watch it break, rebuild smarter. Oxygen Not Included works the same way, except the components are duplicants, oxygen, and plumbing that will eventually back up. This colony simulation from Klei Entertainment drops you and a handful of duplicants on an asteroid where every resource matters and every mistake compounds.

Detail	Value
Version	744825 (2026-07-28)
Developer	Klei Entertainment
Architecture	Intel & Apple Silicon
Interface languages	English, Russian, Simplified Chinese, Korean

On a Mac, the game runs as a strategy sim with a hardcore survival layer. Duplicants dig, cook, and research, but they also suffocate if you don't manage oxygen. Some colonists handle creative problems better; others are faster diggers. Version 744825 is a hotfix that addresses a liquid rendering bug on older GPUs and fixes duplicants teleporting after rescue. Performance depends on base size—small colonies are fine on M1 and later, larger bases with complex gas simulation can slow on Intel machines. Controls are keyboard-and-mouse, no special setup needed beyond the default mappings.

Hotfix changes the feel of a running colony

Version 744825 is a hotfix, so it doesn't add new biomes, duplicant types, or research trees. What it changes is the feel of a running colony over hours of play. The rescue-and-resuscitation fix alone matters: before this patch, a duplicant you pulled from a ravine or a cave could teleport to the bottom-left corner of the map after revival, often inside a wall or behind a resource deposit. You would notice about ten seconds after ordering the rescue, when the duplicant's icon stayed on the sidebar but the duplicant itself vanished. Now they reappear where you expect them, which saves you the trouble of manually moving them back or, worse, watching them suffocate again while stuck in geometry.

The gasket fix is smaller but shows up when you rebuild plumbing. Deconstruct a machine that uses gaskets and the old version would sometimes spawn the wrong gasket element, usually a basic one instead of the reinforced type you installed. That meant your higher-pressure pipe sections would leak later. With 744825, the correct gasket element drops out, so your oxygen and water networks stay consistent after reconfiguration.

The liquid rendering fix and the texture optimizations matter if you run the game on an older Intel Mac. Before the patch, certain liquid tiles—water, liquid oxygen, waste pools—would render with visual artifacts, often flickering or showing the wrong transparency layer. That made it harder to see where you had pipes and where you had open pools.

Strategy players who enjoy systemic problems on a Mac

Strategy players who like problems that escalate systemically will find this game fits naturally. If you play Dwarf Fortress or RimWorld and enjoy watching a small group fail because their own waste or gas pipe layout collapsed, Oxygen Not Included offers the same kind of cascading failure loop. The Mac version handles these simulations well because the game is CPU-bound on colony logic, not GPU-bound on particle effects—so Apple Silicon machines with good single-core performance run it fine even when the base gets dense.

Players who enjoy reading duplicant traits also get more out of the game. Each colonist has individual character traits, and some learn planning easily while others are better at digging. If you like assigning roles based on personality rather than just filling any open job, the game rewards that attention. A duplicant who is good at creative problem solving will produce better research results, and one who is good at digging can mine minerals faster. Version 744825 also fixed the Masterworks skill string, so now when a duplicant finishes a high-quality artwork, the skill description correctly calls it Masterpiece quality instead of some generic label. That matters if you track duplicant skill development.

Survival game players who want a colony sim that punishes neglect in layers—first oxygen, then food, then waste, then disease—will stay engaged. The game does not let you skip any resource loop for long.

Start by choosing an asteroid and landing with three duplicants

You start by choosing an asteroid. Each one has different resource distribution and terrain shape, so you pick based on what kind of early game you want. On a standard start, you land with three duplicants, a small oxygen generator, and a few basic machines. The first fifteen minutes are about digging a small shelter, placing the oxygen generator, and getting the duplicants to collect the scattered resources nearby.

Once the shelter is sealed, the first problem usually appears around minute twenty: the duplicants have consumed the starting food supply. You assign someone to build a hydroponic farm and another to dig for water. Meanwhile, the third duplicant operates the oxygen generator because the CO2 level is rising. You monitor bladder fullness and stress on the sidebar—if any duplicant's stress bar fills, they stop working and start protesting. A protest in a sealed room with limited oxygen is usually the start of a colony collapse.

By the one-hour mark, you have a small base with basic life support. The next bottleneck is expansion: you need minerals from outside ravines to build better machines, but leaving the base means a duplicant spends time in a suit, consuming more oxygen and returning with less time to work inside. You juggle shifts. Around this time, you also build a relaxation machine to keep happiness up. Lower happiness leads to worse task performance and more protests, so the machine is a requirement, not a luxury.

By hour two, the colony has six to eight duplicants. Waste builds up. If you let it sit, diseases spread quickly through the base. You install a waste processing loop, which introduces gaskets and piping complexity.

Setting up a sustainable oxygen and waste loop for four duplicants

This task assumes you have a base with at least four duplicants and access to water and power. Start by assigning one duplicant to dig a small room adjacent to the main living area—roughly four by five tiles. This room will hold the processing machines. Do not place it inside the living space because waste processing produces heat and leaks small amounts of gas.

Next, build an algae-based oxygen generator in that room. Connect it to the main oxygen pipe that feeds the living quarters. The generator requires water input, so run a water pipe from your water source (either a water pump or a melted ice deposit) into the room. Set the generator's output to maximum—you can adjust it later once you have a surplus.

Then build a waste composter in the same room, next to the oxygen generator. Run a waste pipe from the living quarters into the composter. The composter outputs fertilizer and a small amount of methane. Connect the fertilizer output to a hydroponic farm in the living area—this closes the loop: waste becomes food input, reducing how often you send duplicants outside to gather resources. The methane can be vented or burned in a small generator for extra power, but for a starter loop, venting is simpler.

Finally, assign a single duplicant to operate the oxygen generator and the composter. Choose a duplicant with low stress tolerance for this role—they stay in one room and work predictable hours, which keeps their happiness higher than if they were digging outside. Monitor the loop by checking the gas overlay every few minutes. If the oxygen level in the living area drops below 18 percent, add a second generator or increase the pipe diameter. If waste backs up into the living area, check the composter's input pipe for blockages—debris or wrong gasket types are the usual cause.

This loop will sustain a colony of up to eight duplicants with minimal manual intervention. It also frees your other duplicants to research, dig minerals, or build relaxation machines, which pushes the colony toward a self-sustaining state rather than a constant survival scramble.