Resuming paused processes on macOS

My Macbook Pro has been annoying the hell out of me lately, running of out application memory on a regular basis. (You’d think that’d be hard to do with 16 GB of RAM, but apparently my Mac is quite good at it…) Sure, I can restart it to clear the memory and have it load things up again as needed, but there always comes a point when that little window pops up and complains about a lack of application memory.

A couple of times I’ve dismissed that window by mistake and wondered how to restart the suspended application(s). A quick search yielded an option to the kill command that I wasn’t aware of. So the next time I do that by mistake and leave an app or two suspended, I can start up the Activity Monitor, check the process ID of the suspended application(s), and then type:

% kill -CONT <PID>

Hey Presto, app gets unstuck. Yay!

That is, as long as macOS doesn’t decide to suspend the terminal…

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Terminal trees

A long time ago, back when I got my first Mac, I installed MacPorts to get a few extra packages that I used under Linux. Fast forward a few years (and a new laptop) and I’ve forgotten about all of this 🙂 When it came to looking for a way to get the tree command (which displays a directory listing in a tree format), one of the answers was to use MacPorts which prompted me to check and lo-and-behold, I did indeed have MacPorts installed.

A quick check showed that my installed version was waaaaay out of date so I needed to update that before going ahead with installing the package I was after. Thankfully, MacPorts has a nice little migration guide that helped me through the process. (This kind of documentation is vital to cover those instances of redoing something that you might only touch one or twice in the lifetime of a computer.)

Of course, I had to reinstall the Xcode command-line tools along the way… (Why they aren’t included by default I do not know.) I also trimmed my list of port installations to drop a couple I knew I wouldn’t need (such as Perl, which I manage separately with Perlbrew).

Then all I had to do was:
% sudo port install tree
refresh my path and I was good to go. Yay! (Ignore the spacing in the example below – it seems the preformatted text for this WP theme adds some extra padding which breaks up the connecting lines. It should look fine in the terminal.)

/Users/macports/
├── Desktop
├── Documents
├── Downloads
├── Library
│   ├── Keychains
│   │   └── ....
│   └── Preferences
├── Movies
├── Music
├── Pictures
└── Sites

It seems that folks tend to prefer HomeBrew over MacPorts but that’s something for another day.