When comparing ClamXav vs Alfred, the Slant community recommends Alfred for most people. In the question“What are the best Mac OSX apps for someone that's new to Apple?” Alfred is ranked 2nd while ClamXav is ranked 28th. The most important reason people chose Alfred is:
Allows the creation of automated workflows by connecting keywords, hotkeys and actions together without writing code.
Specs
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Pros
Pro Monitor directories easily
The Sentry Feature monitors specific directories 24/7 as well as removable media which includes USB & external drives, all those .dmg files you open when installing apps etc. I add all directories that files are downloaded as a "screening" process.
Pro Lean
Not overly invasive or processor hungry as other antivirus programs
Pro Can create custom automated workflows
Allows the creation of automated workflows by connecting keywords, hotkeys and actions together without writing code.
Pro Full keyboard controls
You can do everything using just the keyboard.
Pro Built-in calculator
Alfred is able to handle simple mathematical commands and more extensive expressions alike. Pressing Enter copies the result to the clipboard.
Pro Integrates with 1Password
Alfred allows getting secure and fast access to your 1Password 1Click bookmarks.
Pro Lightweight and smooth
Alfred is a lightweight application for OS X and runs smoothly, even on older devices.
Pro Versatile search
Quickly search for files, applications and web services from the same input.
Pro Productivity booster
Helps speed up your working day one shortcut at a time.
Pro Clipboard history
Alfred offers a clipboard with an extensive history for quick access to your copied text, images and links.
Pro Entry of everything
Pro Allows theming
Alfred allows adjusting colors, fonts, sizes and more to create new themes.
Pro Offers both a free version and a paid version available
The paid version is more customizable, but the free version is still very powerful.
Cons
Con Does not monitor or protect ram memory
Con Many features require the $25 powerpack add-on
Features like custom workflows, clipboard history, 1Password integrations and others require the powerpack add-on.