MacOS Catalina: Slow by Design?

Post by danudey » Fri, May 22, 2020, 6:15 PM UTC

saagarjha wrote: post #285

derefr wrote: post #177

Earlier quoted context omitted.

IIRC the big thing that changed with 10.15 for CLI applications is that BSD-userland processes (i.e. ones that don't go through all the macOS Frameworks, but just call libc syscall wrappers like fopen(2)) now also deal with sandboxing, since the BSD syscall ABI is now reimplemented in terms of macOS security capabilities. Certain BSD-syscall-ABI operations like fopen(2) and readdir(2) are now not-so-fast by default,…

> IIRC the big thing that changed with 10.15 for CLI applications is that BSD-userland processes (i.e. ones that don't go through all the macOS Frameworks, but just call libc syscall wrappers like fopen(2)) now also deal with sandboxing, since the BSD syscall ABI is now reimplemented in terms of macOS security capabilities. Is this actually new in macOS 10.15? I seem to recall this being a thing ever since sandboxing…

Post by halotrope » Fri, May 22, 2020, 6:16 PM UTC

Sangeppato wrote: post #328

halotrope wrote: post #304

Earlier quoted context omitted.

That is not true anymore. With 20.04 it supports hybrid graphics just fine. The only issue I had was sharing cuda and OpenGL context since GL ran on the Intel card. This should not be a concern for most people I assume.

Can you run everything on the iGPU and only activate the Nvidia GPU to do the render offloading on single apps? If you can, I should try 20.04 on a laptop

Post by cosmojg » Fri, May 22, 2020, 6:16 PM UTC

Myrmornis wrote: post #348

halotrope wrote: post #97

I am using Ubuntu 20.04 on a Thinkpad X1 Extreme Gen2 and you would be surprised how "normal" it feels as a development machine. Sure there some little annoyances, the touchpad behaves a little worse than on windows, sound is a little worse. But the most important things, Keyboard and Screen are excellent. The system in general does not feel like the horror stories that people keep telling about linux on desktop(note…

I would love to switch back to Linux but Apple's Retina displays are absolutely beautiful and there is no way I could enjoy going back to anything with noticeably lower pixel density on a laptop. I'd like to be told I'm wrong, but as far as I know it's not really possible to recreate a comparable high pixel density experience under Linux on a laptop.

Post by eximius » Fri, May 22, 2020, 6:17 PM UTC

glofish wrote: post #334

soraminazuki wrote: post #278

Up until the release of Catalina, I've always upgraded to the latest version of macOS within a month or two. But some of the changes this time is really stopping me from upgrading. As of Catalina, there's no sane way to install the Nix package manager without losing functionality because macOS now disallows creating new files in the root directory[1]. Nix stores its packages in the /nix directory and it's not possibl…

IMHO the original choice of the path seems incredibly ill-advised and the main burden lies with the original developers. sometimes old errors and mistakes come back and bite

Post by seertaak » Fri, May 22, 2020, 6:19 PM UTC

halotrope wrote: post #97

I am using Ubuntu 20.04 on a Thinkpad X1 Extreme Gen2 and you would be surprised how "normal" it feels as a development machine. Sure there some little annoyances, the touchpad behaves a little worse than on windows, sound is a little worse. But the most important things, Keyboard and Screen are excellent. The system in general does not feel like the horror stories that people keep telling about linux on desktop(note…