Steve bought a new iMac with a Fusion Drive, but it seems as slow as his 2013 iMac. Leo says it is! It's a common problem with fusion drives. Leo says that you could have an SSD installed to replace that Fusion drive. However, you don't want to try and do it yourself because you would have to lift your screen off with a giant suction cup to get to the hard drive. You can go to MacSales.com for the hard drive you want.
Tom has four iMacs and each one is getting an error when connecting to ethernet, and can't connect to the Internet because of a "self-assigned address." But he can connect via WiFi. Leo says to go to the Network system preference pane and make sure that Ethernet is dragged to the top. Also, make sure it's using DHCP in the settings. One thing that may be causing the error is that the computer doesn't see the ethernet cable when booting up, and then gives the self-assigned address. It could also be the router itself.
Chuck is using Firefox and recently he's been getting error messages. Leo says that may be due to keeping a lot of tabs open. Should he go back to Safari? Leo says that it's about as good, privacy-wise, as Firefox. But for search, he's currently using StartPage.com for searching anonymously. Use that, and it's just as private as Firefox.
Jody has a ten-year-old iMac. He saw an ad for a 21.5" iMac for $375 refurbished. Leo says that it's always best to buy refurbished directly from Apple. It may cost a little more, but the peace of mind is better. This sounds like a big corporation dumped a bunch of older machines onto Amazon Renewed for sale. Sounds like a good price, though. It really comes down to what year it is, what OS version it's using, and if it can be updated. A Snow Leopard Mac, for instance, can't be updated to Lion. So it's likely a 2010 machine.
Dave has bought two iMacs and they've both died after two days. Leo says it sounds like a power surge in his house that's causing it. Leo advises a power conditioning surge suppressor. It'll have a battery and circuitry that cleans up the power so there's an even flow without surges. Leo likes Tripp Lite and APC, but CyberPower is Leo's current favorite.
Carlin has an iMac that's about 6 years old and it's getting slower and slower. She brought it into a technician, who said it was too old to get parts for it. Leo says that's not really accurate. It's always best to take the iMac into the Apple Store when it needs repair or upgrading, and it can be upgraded.
Dana wants to know if he should reformat his iMac hard drive to make it run faster. Leo says often that's the best thing to do. Since Dave has a bootable image from Super Duper, he can do it and be back up in minutes. He should just boot from the image, then copy the image to his hard drive and he'll be back up. Sometimes it just takes a little spring cleaning. Better yet — he can get an SSD and use the hard drive as his data drive. His computer will be a lot faster with that.
Tom wants to know if he should wait to buy a new iMac. Leo says that it may be a good idea. We're expecting new iMacs any time now, and there is an Apple Event coming in about a month. It'll likely have new processors, an updated screen, and USB-C and Thunderbolt connections. But performance wise, it really won't be much faster, if at all. So if he bought now, he won't be missing out that much.
Elizabeth is having an issue with her Apple iMac rebooting randomly. Leo says that overheating may be the culprit. Computers will shut down or reboot when it overheats. But if it happens when she's doing nothing, then overheating is unlikely. A buggy operating system may cause it if a process is running away. It could also be a power issue in her home. Power can be "dirty" and that could be causing it. Using an uninterruptible power supply (UPS) could prevent low power and power surges. The electrical cord being frayed and loose could cause this too. It may also be a failing power supply.
Dave feels like his computer is possessed. After awhile, it just goes crazy on him. It's an old Mac and runs OS X Lion. Leo says that the problem may be a messed up keyboard or mouse. A 10 year old mac is long past the time to get a new one and there's new refreshed Macs coming next month. He can also get a refurbished one from Apple and save a few hundred bucks.