computer agonizingly slow, with many beach ball.
System Catalina
Your computer is starved for RAM. Please upgrade to 16GB or more. If you do, please only get crucial.com or macsales.com RAM . Both vendors supply high quality products, very fair prices and have excellent service. In short there is no reason to not use them.
The new macOS has several back ground tasks to carry out. Be patient, because depending on your data and Mac spec's, it can take anywhere from an hours to a full day to complete those tasks and settle down.
If you're curious, you can use the CPU section of Activity Monitor to monitor those back ground tasks.
You have it backwards, many programs are not compatible with Catalina, at least their 32 bit versions. iDVD was discontinued close to 10 years ago, really you are blaming Catalina for that. And I'm willing to wager that TT, TW and even SuperDuper all have 64bit versions. Apple has advised you for over a year that 32 bit apps won't run on future (Catalina and beyond) versions of Mac OS. Sounds to me like you just ignored the messages!
Unfortunately that is a short sighted approach as eventually you will need to upgrade to another Mac and there is no way a new machine will run an older OS. Why not move forward and just find a replacement for iDVD, there are many many out there.
I ran EtreCheck but the report is not telling what is causing the problem.
I now have 32 GB installed.
I get this warning every time I boot the computer.
It has been been moved to trash ,but I still get this warning!
Did you empty the Trash???
Yes, and I emptied the trash.
On all re-starts, I get the same warning, I move to trash as suggested, but the trash is still empty!
I finally found Chromium files in applications. I deleted all and no longer get the warning.
I think I will go back to my previous OS!
I had to delete many programs that I depend on.
Did installing more ram solve your beach ball problem ?
Not really!
Also, Catalina was incompatible with many programs, including iDVD, Toast Titanium, TextWrangler, and many others.
I reinstalled my old system (Mojave) and all files, using SuperDuper.
I use iDVD all the time with my Final Cut Pro workmen conduction with Toast Titanium.
Now that I'm back to Mojave Os, thanks to SuperDuper. No more spinning beach balls.
Insalled Catalina and get very many beach balls
