App Nap is explained on this page: https://www.apple.com/osx/advanced-technologies/
It can be disabled by right-clicking Peercoin-Qt.app -> Get Info -> [X] Prevent App Nap
App Nap is explained on this page: https://www.apple.com/osx/advanced-technologies/
It can be disabled by right-clicking Peercoin-Qt.app -> Get Info -> [X] Prevent App Nap