Apple's Time Machine works in a funky way, so go over to your local store and get a large 4TB (or bigger) drive. Also, get Shirt Pocket's SuperDuper program, which will make a bootable external disk that replicates the internal drive in your system. In case something goes wrong with your internal drive, reboot your Mac while holding down the "option" key, and boot the backup. The newest version 3.2.5 supports Mojave and includes their Smart Delete, Smart Wake, and Smart Update features.
Kevin just returned from an Alaska Cruise and downloaded all the photos and videos, but his Time Machine backup will not complete it due to insufficient free space. Leo says it sounds like his hard drive has run out of room. Even with 20GB of free space, Time Machine may be taking a snapshot of the drive locally, before backing it up. Choices: Free up space on the internal drive or buy a larger one.
The chatroom says that if the external drive can't be seen, Time Machine will make the backup locally. So make sure it can see the external drive.
Charles wants to know the best way to set up Time Machine on his Mac with macOS Mojave. Leo says that in the new OS, there is a new APFS file system, and there have been backup issues with Time Machine and others. He may need to use an external drive formatted with the old HFS file system. That will insure that if his internal drive dies, his backup is secure. Leo also recommends not using Time Machine as his primary backup system. He should make an image backup with SuperDuper.
Tim uses Time Machine for his backup, but the backup fails intermittently. His Synology NAS is citing improper credentials as the cause. Leo says that encryption certificates need to be renewed from time to time, and if he's encrypting his data on backup, that could be the issue.
There is a post on Synology forums about this: Time Machine, Making it Work. Learn from my Suffering. There are some steps that can help.
Manny wants to store his photos in the cloud, but he wants to have a better quality image stored locally. Leo says that iCloud always keeps the higher quality image in the cloud. In Google Photos, he can turn off "optimize photos" and it will keep the higher quality locally as well. But Leo says he really won't see the difference.
Eric converted to High Sierra on his Mac and chose APFS on Time Machine. Now he's got trouble. Leo says that Apple cautioned not to do that. Can he at least downgrade? Leo says that the good news is there was no data lost, so he could format it to downgrade from APFS and then let it backup again. Eric should check out this article at macobserver on how to use Time Machine with APFS. He shouldn't convert to APFS if he has a Fusion drive just yet.
Chris says that his Time Machine won't let him set when the backup happens. It just does it when it wants to. Are there any alternatives? Leo says that SuperDuper is a better option. It can not only back up his internal drive, but it can make his external drive bootable so that if his hard drive dies, he'll be back up and running within minutes or even seconds!
Dale says that the Fuji X-T2 and he says that most adjustments can be made without the menu settings. They have dials and buttons like the old days. Leo says that seems to be the trend now, going back to physical dials to make changes while shooting, and you can even reassign and program buttons for your most often used settings. It's mostly in higher end cameras, though. Leo says that they look like the old retro style film cameras and he loves that.
Lance upgraded to macOS Sierra and now his Time Machine isn't working. Apple Care hasn't been able to solve the problem either. He's even reinstalled the OS and Time Machine. It just hangs about 2/3 of the way through the backup. Leo says that nobody really likes Time Machine, especially when it doesn't work. No one really knows how it works, either. If Apple can't figure it out, it's a lost cause.
Jason was at the genius bar at the Apple Store yesterday with his MacBook Pro and he wants to know if Time Machine would be better than Carbonite. Leo says absolutely not. Carbonite is better because it's off site. If his house burns down, Time Machine won't really help him. Carbonite will only work when he's not doing anything. That way it won't take up resources when he needs them to. It's designed to be "nice." The Genius complained that it was using 100% of the processing power, but Leo says that's because the computer wasn't doing anything at the time.