I've just downgraded to 3.1.1 (latest version in my downloads folder) after 4.0 gave me lots of headache for a few days.
I had the following issues:
- Upgrading from 3.1.1 to 4.0 erased all my presets, processes, everything. I lost all those carefully calibrated temperatures for different machines that took hours and cost substantial machine time and material to make. I was able to restore the preferences file from Time Machine, but figuring out that I need to replace ~/Library/Preferences/com.simplify3d.S3D-Software.plist was kind of hard. I may have been behind with my S3D updates, but that's still not cool.
- More like a long-standing bug, but App Nap is still enabled by default. This causes Simplify3d to stop sending commands to my printer when completely covered by other windows, until in pull it to the front again.
- But (this is a bug): It's not possible anymore to disable App Nap from the Finder properties dialog via GUI. The option for it is gone, it's still present on other apps and on S3D 3.1.1. It can be done via command line, but it's a shame that the user-friendly way to do it is gone. I had to do it because I ran into the above-mentioned problem and Activity Monitor showed S3D in App Nap state. Disabling App Nap solved the issue.
- During prints, S3D 4.0 completely bogs down my system. I get multi second typing lag in all applications, although CPU is low (10-20%-ish), memory pressure is low (all green, 2gb+ shown as free), disk IO is low, even ethernet has next to no activity (no idea how to find out about GPU load). No idea what it's even doing, but it renders my relatively capable Macbook Pro Retina 13" almost unusable. This gets worse and worse over the duration of a print, barely noticable at the start and up to 10s typing lag near the end after about 2hrs, and instantly stops once the print is finished. No such issues at all with 3.1.1. This was present before I disabled App Nap too, so it's most likely not related to that.
- Live preview updates very infrequently, sometimes just about twice a minute (update interval is set to 5.0s, I tried 0.5s which i usually use, but that didn't change a thing). Also, it doesn't start with an empty build plates, but shows the first layer(s) as if they were already done. Works flawlessly on 3.1.1. Perhaps there's a connection between that and the performance issues?
I'm on Mac OS X Sierra 10.12.6 on a Macbook Pro 13" Late 2013.
Regards
Felix
