Apple's Operating Systems Are MalwareOther examples of proprietary malware
Malware means software designed to function in ways that mistreat or harm the user. (This does not include accidental errors.) This page explains how the software in Apple's computer products are malware.
Malware and nonfree software are two different issues. The difference between free software and nonfree software is in whether the users have control of the program or vice versa. It's not directly a question of what the program does when it runs. However, in practice nonfree software is often malware, because the developer's awareness that the users would be powerless to fix any malicious functionalities tempts the developer to impose some.
Here's how Apple's systems are malware.
iOS, the operating system of the Apple iThings, is a jail for users. That means it imposes censorship of application programs.
Apple has used this power to censor all bitcoin apps for the iThings.
Apple, in the iThings, pioneered the practice of general purpose computers that are jails, and the term comes from iThing users, who referred to escaping from the censorship as “jailbreaking.”
Here is an article about the code signing that the iThings use to jail the user.
The iBeacon lets stores determine exactly where the iThing is, and get other info too.
The iThings are tyrant devices: they do not permit installing a different or modified operating system. There is a port of Android to the iThings, but installing it requires finding a bug or “exploit” to make it possible to install a different system.
DRM (digital restrictions mechanisms) in MacOS. This article focuses on the fact that a new model of Macbook introduced a requirement for monitors to have malicious hardware, but DRM software in MacOS is involved in activating the hardware. The software for accessing iTunes is also responsible.
DRM that caters to Bluray disks. (The article focused on Windows and said that MacOS would do the same thing subsequently.)
The iPhone has a back door that allows Apple to remotely delete apps which Apple considers “inappropriate”. Jobs said it's OK for Apple to have this power because of course we can trust Apple.
An Apple firmware “upgrade” bricked iPhones that had been unlocked. The “upgrade” also deactivated applications not approved by Apple censorship. All this was apparently intentional.
Apple can, and regularly does, remotely extract some data from iPhones for the state.