Perian is an open source QuickTime component allowing to play many popular video formats that are natively not compatible with QuickTime Player on
Mac OS X. At some point Perian was the perfect solution to any codec problems in QuickTime.
Unfortunately Perian isn't being developed anymore. For those who use QuickTime 10 or newer Perian is no longer useful. If this is the case Perian alternative Mac apps can make a big difference. You should be careful though when looking for Perian alternative since not all of those on the Internet are really helpful.
Among the best Perian alternatives for Mac Elmedia Player stands out with its ability to play lots of file types on Mac OS X (Sierra included). Elmedia Player is a worthy replacement for Perian with its support of all sorts of media file types like MKV, AVI, WMV, etc. on OS X 10.7 and later. It is very easy to install and use.
1.Buy and open the player
To get your high quality alternative to Perian, head to the Mac App Store and buy Elmedia Multiformat Video Player with your Apple ID (given you have a valid payment method registered with your account). Click the price (Buy) under the player's image. Elmedia Player will be downloaded to your machine and then you can open it.
2. Add files
Elmedia offers several ways to add files to it for your convenience:
Elmedia Player supports an impressive array of common and uncommon audio & video formats: FLV, AVI, MOV, WMV, MP4, MP3, DAT, FLAC, M4V, MPG, MKV, etc. Elmedia's features at a glance:
1. Install Perian
Download the plugin, click the disk icon, then double-click Perian.prefPane.
All the components will be installed and updated automatically, you can drag-and-drop them to the Library → QuickTime folder or your private Library, it is accessible only to you, or the top-level Library accessible to all users.
2. Run QuickTime
Once you are done with installation, restart all applications running QuickTime - these could be iTunes, QuickTime Player, web-browsers, etc. That’s it!
Now you can playback videos of these formats using QuickTime. For AVI, WMV, FLV and other common formats use Elmedia Player for Mac.