If you simply need a timeline-based DAW for beats, Apple's Logic Pro (or free GarageBand) is hyper-optimized for Mac hardware. You can export stems from a friend's FL Studio.
Your buffer size is too low. Go to Audio Settings and increase the buffer to 1024 samples. Also, turn off Wi-Fi (MacOS network interrupts often cause audio pops). Download Fl Studio 12 Mac Os X
Since FL Studio 12 is legacy software (last updated in 2018), you will face compatibility bumps if you are running a newer OS. Feature Focus: The Significance of the Native macOS