since you are at the execution phase, i would do the electron app first to get things going. then consider a macOS native. i may be overestimating everything i

since you are at the execution phase, i would do the electron app first to get things going. then consider a macOS native. i may be overestimating everything involved in releasing software for macOS. but i have played with swift and made a few local apps and found it difficult to put desktop apps together. you will find plenty of iOS resources though. they were still porting some of the SDKs to swift from objective-c when i was playing with it. people who know objective-c and the macOS SDKs beforehand would have better luck. with electron, i suspect the open-source community would have solutions for most issues. or tell you the limitations. you will know then what you are gaining with a macOS native app. that's what i would do...