Months of SETI 2008 tasks, comp errors, and occational blc. Is this normal?

[Grissom]

Hello everyone! I'm back after a long absence here but rarely stopped crunching SETI 24/7 two tasks at a time (3 tasks exceed 189F CPU core temp).

I'm using a late 2009 27" iMac OSx ver. 10.12.6 2.8 GHz Intel Core i7 16 GB 1067 MHz DDR3 ATI Radeon HD 4850 512 MB.

Tried to attach 357KB 1,085 x 762px PNG screen shot of SETI task window showing problems but it would not upload using "Manage Attachments". Is it too big? I browsed my computer, selected the screen shot png, and clicked on "upload" but that only displayed my PNG file with no click options or anything happening after that.

For too many months running 24/7 I've been getting nothing but year 2008 tasks with occasional blc. Am I caught in a loop or is this normal? I while back I was getting much newer tasks. If I wanted to run only blc, is that possible?

About 20% of all these 2008 tasks automatically reject as "100.000% Computation error (0.244 CPUs + 1 AMD/ATI GPU ....." immediately after download is complete - "using GPU always". With "Suspend GPU" selected, the error still occurs but I must "Abort" to get them removed from my task screen. Is this normal?

Thanks for reading this far.
SETI screenshot.png