Mac is slow and unresponsive

Before you do ANYTHING please backup!!!!

Next,

It will help us get a good idea of what is causing your problem if you provide a report of your system, that way we do not have to play 20 questions with you. The report we are requesting does NOT provide any personal information and is extremely safe to use. Please navigate to www.Etrecheck.com and download the free version of EtreCheck. Once you have you downloaded the app and installed it, please run the report and save it.

When you have your report, you can attach it when you reply to this message and we can then review it and help you determine what is needed to get your system running well again.

For instructions on how to download your EtreCheck report and attach it to your reply to this message please click https://discussions.apple.com/docs/DOC-250000211

Apple-logo -> About this Mac -> Storage

Click "Manage"

Select "Optimize Storage" (Step 1)

The second step is to look at the left-side of the panel window and examine the files that appear in that section. It will give you an idea as to the files that are eating up your disk space.

As rkaufmann87 emphasized - back up your data first!

Keep us posted.