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Hi Jin-Oh,
Sky Safari Pro is very very good on Mac ($60). I have it on MBP, iPad, and iPhone. Makes many things easier. Info is very comprehensive on all kinds of objects. Beautiful interface and graphics.
Astroplanner is a seriously good planetarium program ($60). I use it All The Time. If you need sky charts down to 16th magnitude, it has UCAC4 as a catalogue. I use it to make finder charts for occultations of minor planets (asteroids) and it cannot be beat. Will download Palomar Obs. Sky Survey images of your chosen area of sky.
Nebulosity is the third app ($60). Will do stacking and dark subtraction and all kinds of stuff.
Hope this helps.
Regards,
Tony Barry
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