The kernel is xnu. It's listed there. They've been releasing the source code for it since the beginning. Here have some source tarballs: https://opensource.apple.com/tarballs/xnu/

With them providing the source code - by choice by the way, since not releasing the source code would not violate the BSD/CMU licenses - is what has made it possible to modify the source and recompile for using AMD CPUs and other supported CPUs with OS X/macOS.

You mean launchd?

They've always kept a lot of their OS X UI closed up but running Darwin by itself and launching X11 off it for a UI (similar to Linux or *BSD) has always been an option. I'd say though since Darwin 10/11 (OS X 10.6/10.7) they've been making it harder, closing updated versions of core driver components up. Same goes for some of the other device drivers for networking cards, newer hardware etc. - in the early 10.0-10.5 days they seemed to be more open about it but they haven't been so open with new device support. It doesn't mean it isn't possible which is why devs have written many of their own drivers to support unsupported hardware. PureDarwin is the current project for running a complete OS based on the open source components of macOS and they're currently working with Darwin 16 (macOS 10.12).

You're making a very fair point but it seems most people who like to point this out don't seem to be too knowledgeable about the OS, what Apple still provides the source for, and what you can do with it.

With the cultural ignorance regarding what eating loads of junk food does to the body and the "healthy at any size/fat is beautiful" movement that the internet helped spread, it'll probably take a lot more than this to convince people otherwise.

I get your point but you lost me here

muscles require more calories to maintain than fat, even if you aren't working out. this is pretty common knowledge. A very muscular person has to eat enough so their muscles aren't used calories in order to reach their metabolic rate with what their body is currently trying to maintain, and this amount is farrrrrrrr more than the common caloric intake of your average, somewhat physically fit human. There is no such thing as a man who has been under-eating long term with extremely defined muscles.

Those aren't "magic filenames" - they're just device nodes that populate at boot time and unlike reserved strings like the ones in Windows, their paths have value. And that link you gave makes no reference to them. the only "filenames" that you cannot use in unix OSes are . and ..

https://www.youtube.com/watch?...

Seriously anyone here claiming that watching a movie or TV show on your mobile device is better than a good sized TV screen with quality audio is insane.

Children with weakened immune systems are very rare. How many kids at your local public school have rare immune system disorders? How many are receiving chemotherapy? Children with decent immune systems who are unvaccinated are far more common. Babies between 2 and 6 months old also have weakened immune systems, as the antibodies passed from the mother have died off and antibody production hasn't fully kicked in.

Seriously you're asking why one is different from the other? Someone who hasn't been vaccinated and has a good immune system who gets infected with certain viruses still has a fighting chance. Someone with a weakened immune system has no chance if they got infected with said viruses, let alone the weakened variants that are in vaccines.

That's why people are sympathetic to one side and critical to the other. The growing amount of unvaccinated kids are causing outbreaks and while they may have a chance of surviving, it's a death setence to a very small minority who depend on everyone else to not carry these viruses.

.. and disabling the device in Windows 10 or the BIOS isn't enough, then just remove the wireless card. If by PC you mean desktop PC, unless it's a USB wifi chip soldered onto the motherboard, it'll be a typical miniPCIe or M.2 card. Remove it. For laptops a physical switch or hotkey for disabling the wifi card at the firmware level is common, but the same goes for that. They're not soldered onto the board (with some very rare exceptions) - they're miniPCIe or M.2 cards that are removable. Whether they're easily accessible varies by laptop model, but they're still removable.

.. and then cover it up with an Otterbox case or something

The bundling style from OS X is an evolved version of NeXTSTEP application bundling from 1989.

the XNU kernel is an evolved version of the XNU kernel from NextSTEP that uses some BSD components, CMU Mach microkernel components and C++ I/O Kit which replaced NextSTEP's ObjC DriverKit. It's not a "BSD kernel" per say. the toolchain is definitely not GNU at all. LibSystem uses no GNU code at all. It uses the BSD standard library libc, not glibc. clang is the compiler, not gcc as that's something they got rid of many years ago. They do still use some software preinstalled that are under GPL but it's no "toolchain". See Apple’s great GPL purge.

A number of important components are completely closed which are needed to boot XNU on its own, like PlatformExpert. So you're not exactly correct in your statement here.

Forget about the closed GUI frameworks and software - Apple closed up a number of mandatory kernel extensions needed in order for XNU to boot since Darwin 9 (OS X 10.5) - this is one of the main reasons why the PureDarwin project has pretty much halted.

If you want to make an open source version of Darwin then it involves some very extensive reverse engineering. A number of tarballs for the kernel extensions that they still provide are completely outdated and many things have changed since then. The current Darwin version is 16.

The extent of the XNU source code these days is used for adding AMD CPU support for osx86.

Faking the CPUID and patching the kernel binary either through the bootloader or manually has been done forever for unsupported CPUs for Hackintoshes. We've gotten many newer Intel CPUs working before Apple added official support. It was done with Haswell-E, Sandy Bridge, and many more. Unsupported Xeon models have been fully functional as well. Apple also releases the xnu kernel source code which is how AMD CPU support has always been added. So you're wrong here - Hackintoshes run better CPUs than Macs all the time and if there's an issue getting in the way with the vanilla kernel then there's no doubt a way to get around it.

Source: me - I helped support unsupported CPUs in the 10.6 kernels. http://wiki.osx86project.org/w...

Looks like wikipedia hasn't updated the list, but just like the PS3, the Sony PS4 is still running a modified version of FreeBSD 9 called Orbis OS.

Here's a list of products that use FreeBSD or modified versions of FreeBSD:

• Adara Networks Software Defined Networking products
• AKIPS network monitoring system
• Apple Inc.'s OS X and iOS, the core of which (Darwin) is built on the XNU kernel (part Mach, part FreeBSD, part Apple-derived code). Much of the UNIX userland tools are mostly based on FreeBSD code.
• Blue Coat Systems network appliances
• Calexium MailFountain is based on FreeBSD 8.1
• Borderware appliances (firewall, VPN, Anti-SPAM, Web filter etc.) are based on a FreeBSD kernel
• Check Point IPSO security appliances
• Citrix Systems Netscaler application delivery software is based on FreeBSD
• Coyote Point GX-series web acceleration and load balancer appliances
• Dell Compellent enterprise storage systems (all 64-bit versions)
• Dell (was EqualLogic) iSCSI SAN arrays
• EfficientIP SOLIDserver DDI (DNS DHCP IPAM) appliances
• Halon SMTP server 3.4 is based on FreeBSD 10.2
• Hobnob WirelessWAN
• IronPort AsyncOS is based on a FreeBSD kernel
• Isilon Systems' OneFS, the operating system used on Isilon IQ-series clustered storage systems
• Juniper Networks Junos
• Junos prior to 5.0 was based on FreeBSD 2.2.6
• Junos between 5.0 and 7.2 (inclusive) is based on FreeBSD 4.2
• Junos 7.3 and higher is based on FreeBSD 4.10
• Junos 8.5 is based on FreeBSD 6.1
• Junos 10.0 is based on FreeBSD 7
• Junos 15.1 is based on FreeBSD 10
• KACE Networks's KBOX 1000 & 2000 Series Appliances and the Virtual KBOX Appliance
• LineRate Proxy appliances
• nCircle's IP360 security products use FreeBSD 6.x
• McAfee SecurOS, used in e.g. Firewall Enterprise (aka Sidewinder)
• NetApp filers based on Data ONTAP
• Netasq intrusion prevention appliances
• Netflix Open Connect appliances
• COMP VPN gateways, some of them certified by the Internal Security Agency for processing classified data
• Panasas parallel network storage systems
• Panasonic uses FreeBSD in their Viera TV receivers
• Sandvine's network policy control products
• Silicon Graphics International uses FreeBSD in their ArcFiniti
• Sony Computer Entertainment's PlayStation 3, consumer gaming consoles.
• Sophos Email Appliance
• Spectra Logic nTier Verde backup appliances
• Statseeker, Network Monitoring Software
• St. Bernard Software iPrism web filter appliance
• Symmetricom Timing Solutions
• The Weather Channel's IntelliStar local forecast computer
• Whatsapp
• Wheel Systems FUDO and Lynx

Here's why Netflix uses FreeBSD:

Regardless of the FreeBSD is dead meme, it's very much actively used and companies that use it contribute to its code. NetBSD, however, is a completely different thing altogether when it comes to people using it.

According to Wikipedia, they make products (hardware) for: Acer, Amazon.com, Apple, BlackBerry, Cisco, Dell, Google, HP, Huawei, InFocus, Microsoft, Motorola, Nintendo, Nokia, Sony, Toshiba, Vizio and Xiaomi. So yeah they build a little more than iPhones.