Apple’s new MacBook Neo has been such a runaway hit that it’s backed Apple into an unusually tricky corner: the very supply-chain hack that made this cheap MacBook possible is now threatening to cap how many units Apple can actually sell, and how much money it can make on each one.

When Apple unveiled the MacBook Neo in early March, the pitch sounded almost too good to be true: a full metal MacBook with a 13‑inch display, solid performance, all‑day battery life, and modern ports, starting at just $599 in the US — or even lower with education pricing. For a company whose laptops have traditionally sat well above mainstream “student laptop” budgets, Neo instantly stood out as Apple’s first true budget Mac in more than a decade, clearly aimed at the Chromebooks and low‑end Windows machines that have dominated schools and first‑time buyers.

The way Apple pulled this off was by reusing something it already had: leftover A18 Pro chips from the iPhone 16 Pro, manufactured on TSMC’s N3E 3-nanometer process. In phones, that A18 Pro came with a 6‑core GPU, but during production, a certain percentage of chips roll off the line with one GPU core that doesn’t quite pass Apple’s standards; instead of throwing those “imperfect” chips away, Apple disabled the faulty core, turning them into perfectly good 5‑core parts for the MacBook Neo.

In semiconductor manufacturing, this practice is known as “binning”: salvaging chips with minor defects and selling them as lower‑tier variants instead of writing them off entirely. In this case, those binned A18 Pro chips are effectively near‑free for Apple, because the main, fully‑working 6‑core versions have already been accounted for in iPhone 16 Pro shipments, leaving the 5‑core leftovers as a sort of supply‑chain bonus. That cost advantage is a big part of why Apple can slap a $599 sticker on a MacBook with an aluminum chassis, 13‑inch display, and Apple silicon under the hood, and still feel good about margins.

The problem now is that Apple’s clever trick worked too well: MacBook Neo is selling faster than Apple appears to have planned for. In his Culpium newsletter, Taiwan‑based columnist and former Bloomberg reporter Tim Culpan reports that Apple’s original plan was to build roughly five to six million units of this first‑generation MacBook Neo powered by binned A18 Pro chips, then move on to a second‑generation model next year with binned A19 Pro silicon from the iPhone 17 Pro line. But demand is so strong that Apple is on track to run out of those leftover A18 Pro chips before it can satisfy all the buyers lining up for the Neo.

That reality lines up with what Apple itself has hinted at: just two weeks after MacBook Neo pre‑orders opened, CEO Tim Cook said the Mac had its “best launch week ever for first‑time Mac customers,” a pretty clear sign that Neo is pulling in people who have never owned a Mac before. Apple’s online store currently lists two‑to‑three‑week delivery estimates for all configurations of the MacBook Neo in the US and many other markets, which is exactly what you’d expect when demand is outpacing the pipeline.

Behind the scenes, there’s another constraint: TSMC’s N3E lines — the second‑generation 3‑nanometer process Apple uses for both A18 Pro and newer chips — are effectively running at full tilt. This same advanced node is also in high demand from other giants, including NVIDIA, and is used across multiple Apple products, from iPhones to higher‑end Macs, which means Apple can’t just flip a switch and conjure up millions more cheap A18 Pro wafers without trade‑offs.

That’s where Apple’s “massive dilemma” comes into focus. If Apple wants to keep riding Neo’s popularity, it has a few unappealing options. One is to pay TSMC a premium to restart or extend A18 Pro production specifically for the MacBook Neo, effectively jumping the queue on an oversubscribed process node. But those wafers would be far more expensive than the original run, and unlike the original “free” binned chips, every new A18 Pro destined for the Neo would be a fresh, fully paid‑for chip that Apple then has to partially disable to match the existing 5‑core GPU spec. That’s an instant hit to profit margins on a laptop that is already priced unusually aggressively.

Another option would be to reshuffle Apple’s overall chip allocation — in other words, take some A18‑class capacity or wafers that were earmarked for other devices and divert them to MacBook Neo. That might keep the Neo flowing, but it would likely constrain supply for other products or raise their cost base, which is not ideal heading into new iPhone and Mac cycles that also rely on advanced nodes at TSMC.

There’s also the nuclear‑option path of tweaking the product lineup itself. Culpan floats the idea that Apple could stop selling the entry‑level $599 model with 256GB of storage and leave only the $699 configuration, which doubles storage to 512GB and adds a Touch ID button. Fewer low‑end units would mean fewer chips consumed at the razor‑thin‑margin price point, and more revenue per machine sold. But for a laptop that Apple has been heavily marketing on its affordability — including education pricing that pushes it down to around $499 for eligible buyers — abruptly killing the cheapest SKU would send a mixed message.

A more elegant, but still costly, move would be to pull forward the second‑generation MacBook Neo with an A19 Pro‑based chip from the iPhone 17 Pro, effectively turning the current model into a short‑lived first chapter in a longer Neo story. That would let Apple tap into a new stream of binned 5‑core A19 Pro chips, but only once enough iPhone‑bound wafers have been produced and tested, and only after Apple has stockpiled a similar pool of “imperfect” but perfectly usable silicon. In the early months, those A19 Pro chips would be anything but free, and Apple would again be balancing yield realities, wafer pricing, and product positioning.

There’s one more possibility that might be the most on‑brand for Apple: keep the MacBook Neo at $599, eat the margin hit, and treat Neo as a strategic investment in the ecosystem rather than a profit engine on its own. If a flood of Neo buyers graduate into higher‑margin products — iPhones, AirPods, services, more expensive Macs — over time, the lifetime value of those customers could more than make up for a thinner margin or even near‑break‑even hardware on this one machine.

From a customer’s point of view, the funny thing is that this entire drama is invisible; all they see is that Apple finally sells a MacBook that doesn’t require a four‑figure budget, and that it’s occasionally hard to get one shipped quickly. Under the hood, though, MacBook Neo is a case study in how far Apple will go to squeeze value out of its supply chain, using binned chips, recycled manufacturing capacity, and tight control over materials like aluminum, DRAM, and NAND to push into a price band that used to belong entirely to its rivals.

The risk now is that success at the low end creates its own ceiling: if Apple can’t secure more affordable 3‑nanometer capacity or a fresh pool of “free” binned chips, the very strategy that made Neo possible could limit just how big this product can get. For a lot of buyers who just want an inexpensive MacBook that feels like a real Mac and not a compromise, that’s a good problem for Apple to have — as long as they can still find one in stock.