High Sierra maintainence?

Given that most machines now use SSDs or Fusion Drives and that HDDs are much faster there is usually no need to defrag unless you have a drive full of very large files that you edit frequently. Otherwise, macOS auto-defrags on the fly.

Disk Warrior is a great tool to use if Disk Utility cannot repair certain disk problems. But it isn't needed for anything more. Replacing the directory does improve search times but not by a great deal. You certainly don't need TTP.

Once a year you should back up your startup drive, preferably a bootable backup instead of a Time Machine backup. Then erase the drive and install a fresh copy of macOS. Carefully restore any third-party software from their original distribution media. Lastly, restore your data which you can comb through at the time and leave behind what you decide you don't need or off-load it to a dedicated storage device.

If you find you are having that "quirky" behavior here is a protocol you can use:

A Troubleshooting Protocol to Identify Problems or Fix macOS El Capitan or Later

You should try each, one at a time, then test to see if the problem is fixed before going on to the next.

Be sure to backup your files before proceeding if possible.

1. Shutdown the computer, wait 30 seconds, restart the computer.
2. Disconnect all third-party peripherals and remove any support software like drivers and plug-ins.
3. Resetting your Mac’s PRAM and NVRAM
4. Reset the System Management Controller (SMC)
5. Start the computer in Safe Mode, then restart normally. This is slower than a standard startup.
6. Repair the disk by booting from the Recovery HD. Immediately after the chime hold down the Command and R keys until the Utility Menu appears. Choose Disk Utility and click on the Continue button. Select the indented (usually, Macintosh HD) volume entry from the side list. Click on the First Aid button in the toolbar. Wait for the Done button to appear. Quit Disk Utility and return to the Utility Menu. Restart the computer from the Apple Menu.
7. Create a New User Account Open Users & Groups preferences. Click on the lock icon and enter your Admin password when prompted. On the left under Current User click on the Add [+] button under Login Options. Setup a new Admin user account. Upon completion log out of your current account then log into the new account. If your problems cease, then consider switching to the new account and transferring your files to it - Transferring files from one User Account to another.
8. Download and install the OS X El Capitan 10.11.6 Combo Update or 10.12.6 Combo Update or Download macOS High Sierra 10.13.3 Combo Update as needed.
9. Reinstall OS X by booting from the Recovery HD using the Command and R keys. When the Utility Menu appears select Reinstall OS X then click on the Continue button.
10. Erase and Install OS X Restart the computer. Immediately after the chime hold down the Command and R keys until the Apple logo appears. When the Utility Menu appears:

1. Select Disk Utility from the Utility Menu and click on Continue button.
2. When Disk Utility loads select the drive (out-dented entry) from the Device list.
3. Click on the Erase icon in Disk Utility's toolbar. A panel will drop down.
4. Set the Format type to Mac OS Extended (Journaled.)
5. Click on the Apply button, then wait for the Done button to activate and click on it.
6. Quit Disk Utility and return to the Utility Menu.
7. Select Reinstall OS X and click on the Continue button.

1. Make sure that you install all software updates

2. Avoid installing shareware 😉

3. When you have an issue, try resetting the SMC and the NVRAM.

4. Restart your computer occasionally

5. Read this User Tip: Mac maintenance steps. Some of the information in it might be outdated, so take it with a grain of salt, but most of it seems solid.

Defragging even a rotating hard drive has become pointless. For years now, the OS will defrag files over a certain size automatically if they need it. For smaller files, it isn't worth the time to do it.

SSDs (and Fusion drives, which are a combination SSD/hard drive) should never be defragged. Being solid state, it doesn't matter where the data is. Anything will read just as fast as they would if the files occupied contiguous cells. All defragging an SSD does is wear it out faster. And then, it doesn't defrag anyway. Rather, the drive keeps rewriting the same data to the dump.

I used to have Drive Genius and TTP years ago. I realized I was upgrading these apps each time a new version came out, and never really used them. I stopped wasting the money on such apps at least 5 years ago.

It has been my experience that any third party app that claims it will clean, make secure, increase performance or any other such thing is in fact lying to you. None of them are needed on the Mac.

The way macOS stores data on disk, defragmentation is not necessary and can actually cause more problems then it solves. Get rid of what ever you are using to do that.

Nothing. Macs take care of themselves. If you are having a problem, you can just post a question here and someone will try and help.

See? Everyone agrees with me. 😎