Does the 2017 iMac Pro Have a Small Battery on the Logic Board?

First thing to do is remove Clean My Mac entirely. #1 cause of issues and slowness.

Also Dropbox is using a ton of CPU. You may want to try turning off its sync options so it's not constantly doing stuff.

Somebody else may find something else.

The old Gx Macs had what was known as a PRAM battery. This helped keep settings through power downs. This is no longer a thing in newer Macs so no, no battery there to be replaced.

If you run an Etrecheck report someone may be able advise in regards to the slowness.

click here ➜ Using EtreCheck - Apple Community

Must have been a G3 because the G5 had a newer ROM version that relocated much of the parameter data, so it was little affected by a dead PRAM battery. On the other hand, the pre-USB G3s could be proper idiots with a dead battery. Been there—done that.

PRAM battery life plummeted when users insisted on unplugging their G3s every night.

The others are correct. On the list of possible "slow iMac" suspects, a dead PRAM batt is about #42.

A big +1 on posting an EtreCheck report. It is our single best tool for helping you in this setting where we can neither see nor remotely access your computer. It will not reveal any personal or secure information.

Please see this excellent user tip on how to post long text reports like EtreCheck's into a forum response:

How to use the Add Text Feature When Post… - Apple Community

Your storage— the usual cause of slow iMacs— is transferring data on the nominals, and is healthy. But SSDs need some room to work so I would not let it get any fuller than it is today. Maybe you don't need 500GB of downloaded files! 😳

I see too many issues here CAUSED by ill-advised reinstalling of the OS. Regardless of if that is from user error or something else, I tend to make it a "last resort" step. I've used Macs since 1989 and the ONLY macOS version where i had need to do the old "Archive and install" for problem corrections was on macOS 10.2 "Jaguar." That was a looong time ago and I've not had to reinstall since.

Backups: I use both Time Machine and Carbon Copy Cloner at all times on my two mission-critical Macs. Belt + suspenders, ya know.

The first thing I would try is ejecting and disconnecting your external drives for testing to make sure they are not contributing. The WD is getting full. If it is a scratch disk, that could be a slowdown as the app tries to find free blocks to write.

Most big apps will casue the High CPU use flag but it is not a big issue for me. However, look at how many of your third-party apps and utilities show crashes and hangs. A review of "what I must-have" might be in order.

Hi,

Newer Macs have NVRAM, Non-Volatile RAM instead of PRAM which does not need battery power to keep data on the chip, so you don't need to replace coin battery, CR2032.