Apple Mac

In 2017 I started using a MacBook Pro, having not used a Mac since 1995 when I was last doing development work on the platform. Needless to say it took some adjusting and getting used to, so this is what I learnt and some helpful, hopefully, notes.

Hints & Tips

Show Hidden Files: in an Open/Save Dialog or in Finder press Cmd+Shift+Period to display hidden files and directories
Print Screen: press Cmd+Shift+3 to get your screen saved as a PNG on the Desktop
Print Part Screen: press Cmd+Shift+4, you then get a cross-hair to select the part you want, or press space when the cross-hair shows to get a camera so you can select a Window. See How to take a screenshot on your Mac - Apple Support for more details and options
Delete: a Mac has the Backspace key but not Delete like Windows, press Fn+Backspace to get a Delete
Do Not Disturb: in System Preferences -> Notifications you can turn on Do Not Disturb "When mirroring to TV's and projectors", a handy option but possibly on by default
Flush the DNS Cache: on OS X 10.9 or higher you need to execute the following two commands:
sudo dscacheutil -flushcache
sudo killall -HUP mDNSResponder


See Apple security updates - Apple Support for details about security updates


If you go to "Apple Menu" -> "About This Mac" -> "System Report" -> "Hardware" -> "Power" -> "Health Information" you will see a "Cycle Count" and "Condition", all being well the condition will be "Normal".

File System

In September 2017 Apple release macOS High Sierra, which was the first shipping of APFS, read more details on this at A ZFS developer’s analysis of the good and bad in Apple’s new APFS file system | Ars Technica.