I am getting a new iMac 27 inch to replace my 2015 model. I've had increasing problems and it is time for a new model. My current model will not let me empty the trash, does the spinning wheel, is sluggish, and a multitude of other issues. I have been backing it up with Time Machine and have tried to set it back to an earlier time when it was working. I am afraid to use Time Machine to start up my new iMAC and do the migration. Should I just start from scratch? I'm not sure what all will be lost. I have backups elsewhere of my important files. I can probably reinstall most programs/apps on my own. Will iTunes and iPhoto be restored without Time Machine somehow through the Cloud? I have no knowledge in this back up area. I've just always blindly trusted Time Machine to protect my computer. Please excuse my ignorance. I just need help please.