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The macOS installation application is code signed, which should be verified to make sure you received a legitimate copy, using the pkgutil -check-signature or codesign -dvv commands.

#Memoranda walkthrough install#

Packet capture of an unencrypted HTTP conversation during macOS recoveryДЄn alternative way to install macOS is to first download macOS Mojave from the App Store or elsewhere, and create a custom installable system image.

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However, this way exposes the serial number and other identifying information over the network in plain text, which may not be desired for privacy reasons. A system image can be downloaded and applied directly from Apple. The simplest way is to boot into Recovery Mode by holding Command and R keys at boot. Always prefer free and open source software ( which macOS is not).

Care should be taken when installing new software.

Ultimately, the security of a system can be reduced to its administrator.

Verify backups work by testing them regularly, for example by accessing certain files or performing a hash based comparison.

Always encrypt locally before copying backups to external media or the 'cloud'.

Create regular backups of your data and be ready to format and re-install the operating system in case of compromise.

This will mitigate damage in case of compromise and data theft.

In addition to full disk encryption, consider creating one or several encrypted partitions or volumes to store passwords, cryptographic keys, personal documents, etc.

Subscribe to announcement mailing lists like Apple security-announce.

Updates can also be downloaded directly from Apple's support site.

macOS system updates can be completed using the App Store application, or the softwareupdate command-line utility - neither requires registering an Apple account.

Patch the base operating system and all third party software.

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Recognize threats and how to reduce attack surface against them.What are you trying to protect and from whom? Is your adversary a three letter agency (if so, you may want to consider using OpenBSD instead) a nosy eavesdropper on the network or a determined apt orchestrating a campaign against you?.To suggest an improvement, please send a pull request or open an issue. Only you are responsible if you break anything or get in any sort of trouble by following this guide. This guide is provided on an 'as is' basis without any warranties of any kind. There is no one single technology, software, nor technique to guarantee perfect computer security a modern operating system and computer is very complex, and requires numerous incremental changes to meaningfully improve one's security and privacy posture. This guide is targeted to power users who wish to adopt enterprise-standard security, but is also suitable for novice users with an interest in improving their privacy and security on a Mac.ДЄ system is only as secure as its administrator is capable of making it. This guide is a collection of techniques for improving the security and privacy of a modern Apple Macintosh computer ('MacBook') running a recent version of macOS (formerly known as 'OS X').