* I can't multitask as efficiently as in Linux or Windows (it has several reasons).
* Most windows can't be maximized (perhaps there's an app for this).
* Select text to copy and paste with middle click doesn't work.
* Full font hinting can't be set. Linux has better font rendering than OS X / Windows (if configured properly).
* The whole system feels too closed and constrained. In Linux, I know that if there's something I don't like, I can usually fix it.
* I can't multitask as efficiently as in Linux or Windows (it has several reasons).
* Most windows can't be maximized (perhaps there's an app for this).
* Select text to copy and paste with middle click doesn't work.
* Full font hinting can't be set. Linux has better font rendering than OS X / Windows (if configured properly).
* The whole system feels too closed and constrained. In Linux, I know that if there's something I don't like, I can usually fix it.