What did you update to....10.11 El Capitan or other?
Please check out the Adobe document on troubleshooting Premiere Elements compiling errors.
For now we will assume something in your project needs adjustment even if you never had a problem like this before on your Premiere Elements 10 Mac.
What video card/graphics card does your computer with Premiere Elements 10 use?
Apparently Premiere Elements 10 Mac is still a 32 bit application. I think that it was not until Premiere Elements 11 that 11 Mac was available as 64 bit application. . Any computer resource issue there in spite of your new computer...32 bit is 32 bit.
As for the HDPVR Capture...what are you capturing with it? Have you checked the HDPVR web site for insights into its development and updates as
El Capitan arrived on the scene?
I downloaded the update as soon as it was available.
I got the best I could in the new Mac Pro. The graphics card is, AMD FirePro d700 6144mb. The memory is 64 gb 1866 MHz DDR3 ECC. The processor is 2.7GHz 12-Core Intel Xeon E5.
I only just had this problem. The odd thing is, yesterday morning, I was connected with a guy from the HDPVR company. He was using my computer. He recorded 10 minutes of something on TV and there was no problem. Then, When I did the show I have recorded on my DVR, I recorded and let it play. At about, 6 minutes and 45 seconds, the video started lagging. Also, the file is saved from the HDPVR thing as an m2ts file. That is what all the other were as well. I downloaded a program to convert it to mpg and premiere DID work. BUT, for a 33 minute show, it said that it would take 52 plus hours to save it. That just does not make sense to me.
Maybe I should upgrade to the newest version of the Adobe program. I use photoshop elements all the time. I have a copyright on a cartoon and am writing a series of kids books. I have wanted the full photoshop. The way you pay for it now makes it seem easier. haha