I just got my refurbished 2017 MacBook pro 15 inch with 512gb of storage and 560 4GB. First time mac OS user here so bear with me What applications should I download, should I boot camp, parallel, VM etc. Are there any tests I can run to make sure the notebook is working properly? Earlier I was downloading fortnite and suddenly my applications froze. I could only close them by right clicking the taskbar at the bottom and hitting quit. The top bar where the battery and setting are wouldn't reply, nor would the button that closes the window respond. I had to hold the power button to shut it down. I haven't turned on the laptop since I went to do other things. What can I do to make sure everything is running fine? Also should I update to High Sierra?