What it is
MacBooster.gen is a detection name for MacBooster, a Mac potentially unwanted program (PUP) promoted as a cleanup or speed-up tool. It often rides along with other installs and then pushes aggressive scans, pop-ups, and paid upgrades. Technical background and indicators are in our MacBooster overview for defenders.
What you may notice
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Frequent scan alerts and paywall pop-ups
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Claims of hundreds of “issues” that aren’t real risks
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New login items and background updaters
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Browser changes or extra add-ons you didn’t approve
How it gets in
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Bundled with “free” apps and repacked installers
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Deceptive ads and fake download buttons
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Installers with pre-checked offers
Remove it now
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Uninstall MacBooster from Applications and remove related login items.
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Delete leftover launch agents, daemons, and profiles you don’t recognize.
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Reset browsers to default search and remove unknown extensions.
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Run a reputable anti-malware scan for macOS and reboot.
Prevent it
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Download apps from official sources only.
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During install, choose Custom and uncheck extra offers.
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Keep macOS and browsers updated.
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Be skeptical of tools that find huge “problems” and demand payment to fix them.