Inside 1 Million Macs: CleanMyMac’s macOS Report (Jan - Apr 2026)

Every day, over one million users open CleanMyMac to clean, protect, and optimize their Macs. But what are they actually finding? What threats are hiding on their machines? And what does that tell us about the state of macOS in 2026?

This report is based on 13.5 million cleanup sessions from over one million Mac users, collected between January and April 2026.

No matter how you slice the data, one pattern is clear: Mac users consistently underestimate what's on their machines, what's slowing them down, and what's putting them at risk.

Key findings

The findings span everything from routine junk cleanup to active malware removal — and they paint a picture most Mac users haven't seen before:

• The average Mac accumulates 5.7 GB of invisible system junk — most of it in folders users will never manually open

• 9 in 10 CleanMyMac users rely on a single automated routine to maintain their Mac, removing an average of 26.4 GB per user

• 41% of Mac users are actively managing performance — Mac maintenance in 2026 means more than just freeing up space

• Nearly 25,000 users had real malware threats removed in under 4 months 

• Yet only 31% of users scan for threats at all — meaning 69% are running blind on security

From reactive to routine: how Mac users are cleaning up in 2026

Smart Care

9 in 10 CleanMyMac users rely on Smart Care as their primary tool 

Mac users don't want to think about maintenance — they want it handled. The majority aren't power users. They look for simple, low-friction routines that automatically address daily Mac frustrations. 

As a single scan that performs a quick system tune-up and security check, Smart Care doesn't require the user to navigate individual tools or make decisions about what to remove. It’s a clear signal about how Mac users want to interact with their own machines in 2026.

Users run Smart Care every ~3 weeks on average — maintenance is becoming a recurring habit

Typical Mac maintenance has been reactive for years. Users would address performance issues when something became impossible to ignore. 

The Smart Care data suggests a visible shift in that behavior. With an average of 5.6 million Smart Care sessions per user in under 4 months, users aren't waiting for symptoms anymore. Regular maintenance prevents problems from compounding in the first place — keeping caches from bloating, junk from accumulating, and privacy traces from building up over months of browsing. 

The difference between a Mac that ages well and one that doesn't isn't luck. Increasingly, it's a habit.

Cleanup

The average Mac accumulates 5.7 GB of invisible system junk

System junk is the biggest source of waste on a Mac, averaging 5.7 GB per scan — more than any other junk type. Living mainly in hidden system folders, it surpasses trash bin clutter by 13x.

The mess you can't see is far bigger than the one you can.

It takes 6 seconds to know exactly how much invisible waste is slowing your Mac

One of the most consistent reasons people avoid maintaining their machines is friction — the assumption that running a cleanup means sitting through a lengthy process, manually digging through folders, or babysitting a scan. When a cleanup scan takes no longer than making a coffee, it stops feeling like a chore. 

561K users cleaned 6,488 TB of junk, averaging 12 GB per user

If you assumed junk files are just taking up space, you'd be half right. They also impact performance — bloated caches slow down the apps that depend on them, and outdated temp files eat into the storage macOS needs to manage memory effectively.

The average CleanMyMac user cleaned 12 GB of invisible waste in a single session — most of it scattered across system folders no one will ever think to open.

12 GB doesn't sound like much — until you realize what it's costing your machine.

👉6,488 TB is actually equivalent to streaming Netflix in HD for over 2 million years.
And it's not even data anyone chose to keep.

macOS security in 2026: the end of the safe Mac myth

Protection

3.3 billion privacy items were found across 1.65M sessions

The "Macs don't get viruses" era isn't fading — it's over. The data patterns show that threats don’t just exist — they're pervasive and personal. The average user who ran a Protection scan had 9,855 privacy items removed in a single session. These are browser histories, saved credentials, location traces, and behavioral fingerprints that apps accumulate over time — data that, in the wrong hands, builds a complete profile of who you are and what you do.  

Nearly 25K users had real threats removed in just 3.5 months 

Modern threats on macOS don't look like the viruses of 20 years ago. They’re designed to be invisible — running silently in the background while everything on the surface looks completely fine. 

They’ve also grown significantly more sophisticated. According to Moonlock Lab's 2025 macOS Threat Report, the Mac malware landscape saw a 67% increase in registered backdoor variants and a 17% rise in stealer variants in a single year.

Only 1 in 3 CleanMyMac users actively scans for threats

The belief that Macs are inherently safe is fading — but behavior hasn't caught up yet. Even among CleanMyMac users — a group already predisposed to Mac maintenance — only 31% ran a dedicated security scan. 

The pattern holds beyond CleanMyMac's user base. Moonlock’s Mac Security Survey found that 44% of Mac users admit they don't do enough to protect themselves. Most rely on iCloud Keychain, Safari, and Apple's built-in features — when threats have already moved well beyond what any default tool was designed to handle. 

10K dedicated Malware Finder scans — is proactive security becoming a Mac habit?

At the same time, a growing subset of Mac users runs a dedicated Malware Finder scan — a behavior that barely existed in the Mac ecosystem five years ago.

Attacking a Mac no longer requires sophisticated technical skills. In 2026, proactive security is what an informed Mac user does. The gap between those who treat it that way and those who leave security completely unaddressed is a pattern worth paying attention to.

👉 The most effective Mac attacks in 2025 didn't exploit software vulnerabilities — they exploited users. Scams like ClickFix trick you into opening Terminal and running malicious commands yourself, bypassing every security layer of macOS. No security software can intervene if you execute the code willingly. If any website ever asks you to open Terminal to "verify" something, close the tab.

Performance optimization is becoming a Mac habit — and the data shows why 

Performance

41% of Mac users are actively managing performance — making it the fourth most-used module in CleanMyMac

That's nearly 1 in 2 users who aren't just cleaning storage — they're going a step further and actively tuning how their Mac runs. In practical terms, it signals that storage bloat and security threats aren't the only felt pain points. Slowdowns, laggy app launches, and sluggish multitasking are just as real and just as motivating. For a significant portion of Mac users, a clean Mac isn't enough — it also needs to feel fast.

Weekly Maintenance: 704,064 sessions

Out of all Performance actions, Weekly Maintenance is the most frequently run, with 704K sessions flagging 3.6 million items. This isn't incidental — it's nearly 4x more sessions than any other Performance action. The pattern suggests that users who engage with Performance aren't doing one-off panic fixes when their Mac freezes. They're building a recurring maintenance routine — treating Mac performance the way you'd treat any system that needs regular upkeep to stay reliable.

60% of Performance users freed up RAM at least once

RAM pressure is one of the most immediately noticeable Mac problems: apps slow down, switching between tasks feels sluggish, and the fan starts running. The fact that 6 in 10 Performance users reached for RAM relief specifically suggests this isn't background maintenance — it's a response to something they're actively feeling while working.

👉When Apple launched the $599 MacBook Neo in March 2026, it sparked a wider conversation about how macOS actually manages memory. macOS compresses inactive data and manages RAM far more efficiently than most operating systems, making its 8GB unified memory more effective than the spec implies.
But there's a ceiling — and proactive memory management keeps your machine on the right side of that ceiling.

Applications

The average Mac carries 2,897 orphaned app fragments

When you drag an app to the Trash, you're only removing the visible part of it. Every installation leaves a trail of caches, preferences, and support files scattered across your system — none of which macOS removes automatically. 

And it's not just a storage problem. These app fragments conflict with active processes and degrade performance in ways that are hard to trace back to their source.

CleanMyMac users cleaned 793 TB of app data that macOS would never reclaim on its own

503K users ran Applications cleanup in under 4 months, removing 1.45 billion leftover items across 921K sessions. Nearly 1 in 2 Mac users discovered that uninstalling an app and fully removing it are two completely different things.

18,000 users don't just clean their apps — they actively manage them 

Keeping apps updated is one of the most effective and most overlooked security and performance habits on macOS: outdated apps are a common attack vector, and unpatched software is a leading cause of unexplained slowdowns. The data suggests a growing subset of Mac users is shifting from reactive cleanup to proactive system management in one place.

Most Mac users have never seen the full picture of what's on their drive 

My Clutter 

The average Mac has 5,358 duplicate and clutter items waiting to be removed 

The majority of users don't realize how deep clutter runs until they scan. The average CleanMyMac user has 5,358 clutter items identified across their system — duplicates, forgotten downloads, near-identical photos, and files that haven't been opened in years. That’s years of downloading and saving "just in case" — quietly consuming storage in folders most users haven't opened in months. 

Duplicate Finder scanned 25.6 million items — one of the most data-intensive operations in CleanMyMac 

Across 14,434 sessions, Duplicate Finder mapped 25.6 million items — reflecting just how deep duplicate sprawl runs on a typical Mac. These aren't just extra copies of one or two files. They are years of accumulated redundancy: software installers kept after installation, project files backed up multiple times, documents that exist in Downloads, Desktop, and three different folders simultaneously.

2.18 million near-duplicate photos found — most of them never reviewed

Photos are the silent storage killer on most Macs. Across 9,617 scan sessions, Similar Images found 2.18 million near-duplicate photos. That averages to 227 near-duplicate images per scan session — years of camera rolls never reviewed, quietly eating storage in the background. 

Space Lens 

External drives hide 19.6 billion forgotten items

41,222 Space Lens sessions mapped external drives, surfacing 19.6 billion items across those scans. The assumption most people make is that external drives are organized by definition — you put things there deliberately, so you know what's there. 

The data tells a different story. External drives accumulate the same pattern of forgotten files, duplicate backups, and abandoned projects as internal storage — just out of sight and therefore out of mind for even longer.

The users who dug deepest found the most: 28.7 billion items across targeted folder scans

Across 488K Space Lens sessions, 13.6 billion items were mapped. Custom Folder scans alone surfaced 28.7 billion items across 26K sessions — users doing targeted, forensic-level investigations into specific corners of their drive. This isn't passive cleanup behavior. It's users who already suspect something is wrong and are going looking for it with intent.

Conclusion

Reports like this are easy to read as a collection of numbers. Billions of items. Terabytes of junk. Millions of sessions.

Behind all of it is something harder to quantify — work that wasn't interrupted, storage that didn't suddenly run out, data that wasn't exposed.

The difference between a Mac that ages well and one that doesn't won't come down to hardware alone. As maintenance becomes a habit, what will separate well-performing machines from struggling ones is how quickly their owners can see what's happening under the surface. 

CleanMyMac is built around exactly the patterns this data reveals — for those who'd rather know than assume.