To View the contents of your Praat Files by pressing SPC as you do with other documents you may use the Praat Quick Look Plugin. More specifically, the plugin allows you to view Praat files such as Praat Script Files and TextGrids. To do so follow the instructions below:

i. Download the Quick Look Plugin (it is a zip file so unzip it first).

ii. Copy the Plugin to /Library/QuickLook/

iii. Open Terminal and run the command qlmanage -r