My 2017 iMac with OS 10.15.6 runs way too slow.

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 We can then look for obvious issues that may be causing your problem.

There are a few issues, however the primary problem is you did not buy the correct Mac for your needs. In short, you have an entry level iMac that is designed for doing e-mail and surfing the Net. However you are using it with professional grade apps. It is limited by having only 8GB of RAM that cannot be upgraded by end users and a glacially slow 5400 RPM HD. The ONLY thing that will improved performance on this machine is to buy an external USB 3 or Thunderbolt SSD, clone your internal HD to the SSD and then use the SSD as your primary drive and use the internal HD for additional storage. You can clone the drive using either SuperDuper! or Carbon Copy Cloner.

The other thing I see is you have an app call CleanerOne installed, at best this is worthless and should be uninstalled. Mac OS does not require any third party "maintenance" apps to run well, this includes antivirus, cleaning, security and any other types of maintenance apps.

Best of luck.

It posted as an Attachment in Safai and won't open. Did you use the "Additional Text" tool?

Okay.

Primarily the Adobe apps but anything else is going to tax that poor thing, and even then it will remain a very slow computer.

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