When comparing Hazel vs Spectacle, the Slant community recommends Hazel for most people. In the question“What are the best power user tools for macOS?” Hazel is ranked 14th while Spectacle is ranked 35th. The most important reason people chose Hazel is:
Hazel watches whatever folders you tell it to, automatically organizing your files according to the rules you create. Have Hazel move files around based on name, date, type, what site/email address it came from (Safari and Mail only) and much more. Automatically put your music in your Music folder, movies in Movies. Keep your downloads off the desktop and put them where they are supposed to be.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Automatically cleans up and maintains folders
Hazel watches whatever folders you tell it to, automatically organizing your files according to the rules you create. Have Hazel move files around based on name, date, type, what site/email address it came from (Safari and Mail only) and much more. Automatically put your music in your Music folder, movies in Movies. Keep your downloads off the desktop and put them where they are supposed to be.
Pro Very customizable
More so than alternatives.
Pro Cleans up after uninstalling an application
When you delete an application Hazel will pop up and show you a list of attached files belonging to the deleted app to clean your uninstall more correctly.
Pro iLife Support
Hazel features new actions to import your files into iPhoto or iTunes. And with Hazel 3, you can import into Aperture projects and folders as well.
Pro Process files depending on their content
Its in-file search criteria allows it to extract dates from files (e.g., to add to the filename) and to categorize recurrent files (e.g., receipts) into subfolders (or to treat them in some specific way).
Pro Free and open source
Spectacle is licensed under MIT with source code available on GitHub.
Pro Simple hotkeys
Spectacle offers easy-to-remember preset hotkeys.
Pro Mouseless
All windows in Spectacle can be controlled with keyboard shortcuts, so no mouse is needed. This makes for a fast way to control windows.
Pro Great UX
Spectacle is easy to use and configure. It's plug and play.
Pro Low footprint
Spectacle only uses up 18-19 MB of RAM, which means there is not much overhead by using this app.
Pro Multi-monitor support
Pro 7+ years of use
Using it for 7 years
Cons
Con Expensive
Con Doesn't work well with subfolders
The rules don't work very well with subfolders and working with archive files (zip, rar, gz, 7z, etc) is also limited.
Con Rules creation is a time consuming process
To really enjoy the power of Hazel, you will need to progressively create more and more rules to manage each specific kind of file, but this process is slow, quite annoying when you have many similar rules, and can only be learned on the way, as you find new uses for it.
Con Not maintained
The software is free, but no longer seems to be maintained.
Con Impossible to add new functions
While keyboard shortcuts can be changed for the available actions, there is no way to add custom actions which in turn limits the functionality of the app.
Con Limited window sizing capabilities
You can use 1/2 of the screen vertically and horizontally (divide into 4 parts). You can also use the screen in thirds too, but only the left and right third: you can't use the 1/3 in the center. There is no way to do a more granular distribution.
Con Breaks on macOS High Sierra / Chrome or Firefox
Doesn't support side by side windows.
Con Doesn't work with any Adobe products
There are some apps like Adobe Reader that do not work with Spectacle. Basically, any app with a heavily customized UI that breaks OS X accessibility will not work correctly under Spectacle.
