Guide / Mac malware scan

How to run a Mac malware scan without handing over your files

Understand Mac malware scans, XProtect, persistence checks, known hash databases, and what MacTidy can and cannot detect.

Sources checked: support.apple.com, cms-static.macpaw.com, malwarebytes.com. MacTidy claims on this page are grounded in the local app engine and current preview download notes.

Malware Scan illustration for Mac malware scan. — Mac Malware Scan: useful cleanup starts with a reviewable list.

A Mac malware scan should be honest about its signals. macOS already has XProtect, Gatekeeper and notarization. A third-party tool can still help by auditing persistence, signatures, configuration profiles and known malicious hashes.

Understand what macOS already does

Apple documents several built-in protections, including Gatekeeper, notarization and XProtect. Those layers reduce the chance that known malicious software runs, and they update quietly. A Mac security tool should complement those layers rather than pretending they do not exist.

Scan the places malware persists

MacTidy checks launch agents, launch daemons, Background Task Management entries, cron jobs, recent downloads and configuration profiles. It classifies items by code signature, notarization state, known family indicators, suspicious locations and optional MalwareBazaar hash matches.

Keep file scanning local

MacTidy downloads public malware fingerprints and compares them locally. Your files are not uploaded for scanning. The tradeoff is clear: known hashes are useful, but a brand-new sample can evade any hash-only check.

Know the product boundary

MacTidy is an on-demand scanner, not a real-time antivirus engine. Malwarebytes and CleanMyMac emphasize real-time protection in their Mac products. MacTidy takes a different position: show persistence and suspicious items clearly, stay lightweight, and avoid kernel extensions.

MacTidy workflow. Scan, read the list, untick what you want to keep, then remove selected items. The app is currently distributed as a developer preview DMG, so the download page calls out the signing and notarization status before installation.

Quick checklist

Update definitions before the first scan.
Review malicious and suspicious findings separately.
Inspect unsigned startup items closely.
Use Apple security updates and safe install habits as the baseline.

FAQ

Does macOS already include malware protection?

Yes. Apple documents Gatekeeper, notarization and XProtect as built-in malware protections.

Is MacTidy a real-time antivirus?

No. It is an on-demand malware and persistence audit. It does not monitor every file open in real time.

What does MacTidy check for malware?

It checks startup locations, recent downloads, profiles, code signatures, known indicators and optional local hash matches.

Do my files get uploaded during a scan?

No. MacTidy downloads definitions and compares fingerprints on your Mac.