In order for you to play Peggle Nights on macOS with minimal graphics settings, your computer must meet the following requirements
Operating System:
OS X version Leopard 10.5.8, Snow Leopard 10.6.3, or later
Processor (CPU):
Intel Core Duo 1.66 GHz
Memory (RAM):
512 MB RAM
Internet:
Internet connection is required to register both the download and back-up CD-ROM version of the game