I’ve paired my MBA down to the bare essentials and it’s just performing like crap. No matter what I do every week I spend a few hours trying to delete more and more less essential applications. One thing that cooked my goose is that one of my deepest dependencies is XCode and I had uninstalled it. As a side effect I would get random popups asking me to reinstall XCode and the command line extensions. Just no fun at all even though I had anywhere from 5 to 15GB free depending on what was in the trash.Today I decided to start my SSD upgrade but that did not go well. I performed a time machine backup and while it seemed to be backed up it had not. The restore failed. So I had to reverse everything I had performed and do another backup onto a different disk.The checklist looked like:timemachine backup everythinginstall the new SSDpower up + CMD+Rformat the new driveinstall the OS and make sure it’s the same versionSame version?log into the machine with a new (different) temporary useridlaunch finder and navigate to apps/utilitieslaunch the migration app and followDifferent version?Log into the machine with a new (different) temporary useridupgrade the OS to the same version as the timemachine backupyou’ll reboot a few timeslog into the machine with a new (different) temporary useridlaunch finder and navigate to apps/utilitieslaunch the migration app and followwhen restoring from the timemachine backup there is are some options to restore users, delete users and so on. Read it carefully.UPDATE It has been a few days since the drive upgrade. The machine is doing the same work it was doing before the upgrade. Only one app seemed to be wonky with two instances running at the same time. I hope I deleted the correct one.