macOS version market share worldwide 2018-2026

macOS market share worldwide from 2018 to 2026, by version

How quickly do Mac users adopt each new version of macOS, and how long do older versions linger? This report tracks the market share of each major macOS version worldwide, month by month, from 2018 to 2026, from High Sierra through to the latest release, macOS Tahoe. It is a portrait of a steady, predictable upgrade cycle, one that is slower and more fragmented than the equivalent pattern on the iPhone, reflecting the longer lives and more varied uses of Mac computers. Where iPhones are replaced every few years and updated almost in lockstep, Macs persist for far longer, producing a richer mix of versions in active use at any moment. That diversity is the central fact that shapes everything in this report. It is what sets the Mac apart from the tightly synchronised iPhone. The contrast between the two platforms runs through every chart here. It is the single most important idea for understanding macOS adoption. Everything else in this analysis follows from that one fundamental difference.

The shape of the data is a series of overlapping waves. Each autumn Apple releases a new macOS version, named after a place in California, and over the following year it climbs to become the most used version, while its predecessor recedes. The volumes of Macs running this software are tracked in our Apple Mac sales analysis, though Mac users tend to upgrade more gradually than iPhone owners do.

As of mid-2026, macOS Tahoe, released in September 2025 with the new Liquid Glass design, is the dominant version, used by a clear majority of Macs. Its predecessor, Sequoia, holds a substantial minority, and a long tail of older versions, Sonoma, Ventura and earlier, accounts for the rest. The two newest versions together cover the large majority of active Macs, but a meaningful slice runs older software. That blend of a dominant newest version and a stubborn older tail is the signature shape of the macOS installed base. No other major platform combines fast majority adoption with so durable a tail. The Mac sits in a category of its own in that respect. Few ecosystems balance currency and longevity so distinctively. The Mac manages to stay modern while honouring older hardware.

An important note on the data. StatCounter, the usual source for version share, cannot correctly separate macOS versions released since Catalina, because Apple reports them all as Catalina, a known measurement issue. This report therefore uses a modelled major-version view, informed by TelemetryDeck data and the timing of each release. The figures are careful estimates of the real adoption pattern, not exact counts. The trends they capture are reliable, even where the precise monthly percentages should be read with appropriate caution. The direction of travel matters far more than any single decimal point. Readers should weigh the overall pattern, not the exact figures. The broad arc is what these estimates capture best. Precise monthly counts are beyond what any model can promise here.

macOS Versions: Release, Peak Share and Mid-2026 Share

The table lists the major macOS versions covered, their release year and the California place they are named after, along with the approximate peak share each reached and its share as of mid-2026. The newest versions dominate the recent figures, while older releases have dwindled to small remnants. Sorting the columns shows how each version rose to prominence and then gave way to its successor. Read top to bottom, the table is a roll-call of the California place names Apple has worked through over the years. Each name marks a year in the Mac steady march forward. The list reads almost like a calendar of Apple recent history. Each release marks another step in the platform evolution.

Tahoe Takes the Lead

As of mid-2026, the macOS landscape is led decisively by Tahoe, the version released in September 2025. It is used by a clear majority of Macs worldwide, having climbed steadily since its launch. Its arrival brought the Liquid Glass interface, a translucent redesign shared with iOS, and it was notable as the final version of macOS to support Intel-based Macs.

Behind Tahoe sits Sequoia, the previous version, still running on roughly a fifth of Macs as users gradually upgrade. Further back, Sonoma, Ventura and a scattering of older releases make up a long tail. This tail is longer than on the iPhone, reflecting the many older Macs that remain in service, a durability that supports Apple ecosystem revenue tracked in our Apple Mac revenue analysis.

The current snapshot captures a healthy but unhurried upgrade cycle. A clear majority of Macs run the latest version within a year of its release, a strong adoption rate by industry standards, yet a persistent minority lingers on older software. This balance of rapid majority adoption and a stubborn tail is the defining characteristic of macOS version share, and it underpins the steady ecosystem revenue in our Apple total revenue analysis.

The Overlapping Waves

Plotting all the major versions together reveals the overlapping-wave pattern clearly. Each version rises from nothing after its autumn release, peaks as the dominant version within a year or so, then declines as its successor takes over. The lines cross in a regular cadence, one handover each year, tracing the steady annual rhythm of the macOS release cycle, a pattern that mirrors the one in our iOS version share analysis.

What stands out is how each version peaks at a somewhat lower level and is overtaken a little faster in recent years, a sign of gradually quickening adoption. The newest versions, Sequoia and Tahoe, climbed to majority share more briskly than the likes of Mojave or Catalina did, helped by smoother update mechanisms and the free, prominent upgrade prompts Apple now uses. The same machinery that drives fast iPhone adoption is increasingly at work on the Mac, pulling users forward each autumn. The annual cadence has become almost ritualistic in its regularity.

The trend lines also show the persistent floor of older versions that never quite disappears. Unlike on the iPhone, where old versions fade close to zero, macOS retains a visible base of older releases, the legacy of long-lived Macs and machines that can no longer upgrade. This fragmentation is modest but real, and distinguishes the Mac from the more uniform iPhone base. The Mac is simply a more varied platform, spanning a decade of hardware in a way the iPhone rarely does. A Mac bought years ago often still runs, just on older software. That durability is a quiet strength, even as it adds fragmentation.

The Current Release

macOS Tahoe, version 26, is the current release and the centrepiece of the recent data. Launched in September 2025, it carried a new naming scheme, jumping from version 15 to 26 to align with the year-based naming Apple adopted across its platforms, matching iOS 26. Its headline feature was Liquid Glass, a translucent interface redesign that gave the Mac its freshest look in years. The redesign generated unusual excitement for a macOS release, helping to pull users onto the new version more quickly than usual. A striking redesign can be a powerful adoption driver in its own right. Tahoe novelty clearly helped speed its uptake. A fresh look gives users a reason to upgrade sooner.

Tahoe adoption followed the familiar macOS curve, climbing steadily through late 2025 and into 2026 to become the most used version by early in the year. By mid-2026 it ran on a clear majority of Macs, a healthy adoption pace that reflected both the appeal of its redesign and the smooth, free upgrade path Apple provides, a strategy that underpins the ecosystem value in our Apple revenue by segment analysis.

Tahoe also carries historic significance as the last version of macOS to support Intel-based Macs. From the next release onward, macOS will run only on Apple silicon, completing the transition begun in 2020. This makes Tahoe a kind of bridge, the final release to span both the Intel and Apple silicon eras, before the Mac becomes a wholly Apple-chip platform. The long transition that began in 2020 thus reaches its conclusion with the release that follows Tahoe. The Mac will then be, for the first time, a single-architecture platform. That unification promises a simpler, more efficient future for the Mac. The end of Intel support closes a long chapter in the Mac story.

Staying Current

A useful way to gauge fragmentation is to track the combined share of the two newest macOS versions. Across the period, the two most recent releases together have typically accounted for a large majority of active Macs, usually somewhere above eighty percent. This high combined share shows that most Mac users stay reasonably current, running either the latest version or the one before it. For developers and Apple alike, that concentration is a considerable advantage, keeping most users on supported, secure software. A concentrated base is easier to protect and easier to build for. Both Apple and third-party developers benefit from that concentration.

That said, the two-newest share on macOS sits a little below the equivalent figure on the iPhone, where the two latest versions often exceed eighty-five percent. The gap reflects the Mac longer tail of older software, a structural difference between the platforms. Macs simply last longer and upgrade a little more slowly than iPhones, a contrast visible against our iPhone 15 adoption analysis.

The combined share of the two newest versions has crept upward over the years, a sign that adoption is gradually accelerating. As Apple has refined its update process and as more Macs run Apple silicon, which handles updates smoothly, the proportion of users staying current has risen. The Mac is slowly becoming a little more like the iPhone in its upgrade behaviour, though a gap remains. The convergence is real but partial, and the Mac structural differences ensure it will never fully close. Long-lived hardware guarantees a permanent gap between the two platforms. The Mac will always carry more history with it than the iPhone. That is the natural cost of building such durable machines.

Same Shape, New Names

Taking snapshots at the end of selected years shows how completely the macOS landscape turns over. At the end of 2020, Catalina dominated while Big Sur, just released, was beginning its climb. By the end of 2022 Monterey led with Ventura rising; by the end of 2024 Sonoma led with Sequoia rising; and by mid-2026 Tahoe led with Sequoia receding. Four snapshots, four different leaders, yet the same underlying picture each time, a dominant version flanked by a rising successor and a fading tail. The cast changes every year, but the play is always the same. That predictability is the defining trait of the macOS cycle. It makes the platform unusually easy to forecast and plan around.

Each snapshot looks structurally similar, a dominant version, a rising successor and a tail of older releases, yet the specific versions are entirely different. This regularity is the essence of the macOS cycle: the names and numbers change every year, but the underlying shape of adoption stays remarkably constant, a predictability that few software platforms match. Windows, by contrast, sees versions linger for many years, with no such clean annual handover. Apple control over its ecosystem produces a tidiness Microsoft can only envy.

Comparing the snapshots also reveals the gradual acceleration of adoption. The leading version commands a slightly larger share in the more recent snapshots, and the tail of very old versions has thinned over time. The macOS base is becoming modestly more current, even as it retains more fragmentation than the tightly clustered iPhone ecosystem. The Mac is becoming more current, but it remains, and will likely always remain, a more varied platform than the phone. That is a feature of the Mac longevity, not a flaw in its adoption.

Reaching a Quarter of Macs

Measuring how quickly each version reaches a quarter of all Macs captures the pace of adoption. In the earlier part of the period, versions like Mojave and Catalina took several months to cross the twenty-five percent mark. More recent versions, Sonoma, Sequoia and Tahoe, reached that threshold noticeably faster, a clear sign of accelerating uptake. The gap between a version release and its rise to prominence has narrowed steadily over the years. Newer versions simply reach critical mass sooner than their predecessors did.

This quickening reflects several factors: smoother and more automated update mechanisms, the prevalence of Apple silicon Macs that update reliably, and Apple increasingly prominent prompts encouraging users to upgrade. Each new release tends to reach majority status a little sooner than its predecessor, a trend that strengthens Apple control over its platform and its security posture. The faster users move to the newest version, the more uniform and defensible the Mac base becomes. Security and consistency both improve as adoption accelerates.

Faster adoption benefits both Apple and its users. It means new features and security fixes reach more Macs more quickly, and it simplifies life for developers, who can target newer software with greater confidence. The accelerating pace is a quiet but meaningful improvement in the health of the Mac platform, narrowing the historic gap with the faster-moving iPhone, and supporting the margins detailed in our Apple net income analysis.

The Persistent Tail

Tracking the combined share of older versions, those beyond the two most recent, measures the Mac fragmentation directly. This older share has hovered in the mid-to-high teens for much of the period, higher than on the iPhone, and represents the Macs running software two or more generations behind the latest release. It is the clearest single measure of how fragmented the Mac base is. Tracking it over time shows whether the platform is growing more or less uniform.

Several factors sustain this older base. Macs are durable and expensive, so many remain in use for five, seven or even ten years, long after they stop receiving the newest macOS. Some older Macs cannot run the latest versions at all, and some users, particularly in business settings, deliberately defer upgrades for stability, a caution echoed across the enterprise market. In managed environments, IT departments often hold back updates until they have tested them thoroughly.

The older share has slowly declined over the years as adoption has quickened and as more of the installed base has shifted to Apple silicon. But it has not vanished, and it is unlikely to. A persistent tail of older macOS versions is a structural feature of the Mac, the price of long-lived hardware, and a clear point of difference from the more uniform world of the iPhone in our Apple iPhone revenue analysis.

How High Each Version Climbed

Comparing the peak share each version reached shows how dominant each release became at its height. Most major versions climbed to somewhere around half to two-thirds of all Macs at their peak, before their successor pulled them down. The peaks have risen gradually over time, with the most recent versions reaching higher pinnacles than the earlier ones. The ceiling on any single version share has risen as adoption has quickened.

The rising peaks reflect the same accelerating adoption seen elsewhere in the data. As each version reaches majority faster and climbs higher, it signals a Mac base that is increasingly willing and able to stay current. The trend mirrors, at a slower pace, the very high peaks seen on the iPhone, where the newest version routinely commands a commanding majority. The Mac is climbing toward that pattern, even if it has not yet reached it.

No macOS version, however, has reached the towering peaks common on the iPhone, where a single version can exceed eighty percent. The Mac more fragmented base, with its persistent tail of older releases, caps how high any single version can climb. This structural ceiling is a defining feature of macOS adoption, and a lasting contrast with the iPhone tighter ecosystem detailed in our smartphone vendor share analysis.

A Consistent Curve

Overlaying the lifecycle of each version, aligned to its months since release, reveals a strikingly consistent adoption curve. Each version rises steeply in its first few months, reaches its peak around the time its successor launches, then declines along a similar path. The curves are near-replicas of one another, a testament to the regularity of the macOS cycle. Each version walks almost the same path as the one before it, just shifted forward by a year.

The consistency of these lifecycle curves is what makes macOS adoption so predictable. Knowing how past versions behaved allows a confident forecast of how the current version will rise and fall. The newer curves are slightly steeper, reflecting the gradual acceleration of adoption, but the overall shape has held remarkably steady across nearly a decade of releases. That stability makes the macOS cycle one of the most forecastable in all of consumer software.

These lifecycle patterns ultimately reflect Apple control over its ecosystem. By providing free annual upgrades, prominent prompts and smooth update mechanisms, Apple has engineered an adoption curve that is the envy of the wider computing industry, where upgrades are often slow and fragmented, a coherence that supports the company overall strength in our big tech revenue comparison analysis.

Across nearly a decade, macOS version share has told a story of steady, predictable renewal. Each autumn a new version arrives, climbs to dominance within a year, and gives way to its successor, in a cycle so regular that the only thing that changes is the name. The latest chapter belongs to Tahoe, which by mid-2026 commands a clear majority, carrying the new Liquid Glass design and marking the end of Intel support on the Mac. It is a fitting capstone to a transition that reshaped the Mac over half a decade.

Beneath the regularity lies a quiet trend toward faster adoption and a slowly shrinking, but stubbornly persistent, tail of older versions. The Mac remains more fragmented than the iPhone, the natural result of long-lived hardware and varied uses, yet it grows a little more current with each passing year. The macOS upgrade cycle stands as one of the most orderly in computing, a model of how a platform can renew itself year after year, a coherence that supports the company standing in our biggest companies by market value analysis.

Frequently Asked Questions: macOS Version Share