Mac build README.md update
Mac build README.md update

mac build updates.
VishwasShashidhar/SymphonyElectron,VishwasShashidhar/SymphonyElectron,VishwasShashidhar/SymphonyElectron,KiranNiranjan/SymphonyElectron,VishwasShashidhar/SymphonyElectron,KiranNiranjan/SymphonyElectron,KiranNiranjan/SymphonyElectron,KiranNiranjan/SymphonyElectron