The Path Of Energy Mac OS

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The Path Of Energy Mac OS

May 4, 2013 11:51 PM

The Path Of Energy Mac Os 8
The Path Of Energy Mac Os Catalina
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The Path Of Energy Mac Os X

Great guide, thanks John.

The Energy tab of Activity Monitor displays the Energy Impact of each open app based on a number of factors including CPU usage, network traffic, disk activity and more. The higher the number, the more impact an app has on battery power. More detail, but still vague. Enough so that various other people have wondered what it means.

Just a note, in case anyone has the same issue. At first I couldn't get this to work. I tried logging out and back in (still no joy), then restarting the mac (still no joy).

Try doing both of those first. However, if, like me, you still can't get the local host site to load, try the following: You should find a file at /Library/WebServer/Documents/index.html.en . This contains the text 'It works!' referred to in the post. What I did was duplicate that file in the same folder and changed the duplicate's name to 'index.html', leaving the original in situ.

Follow the instructions below for Mac OS X Version 10.4, nicknamed 'Tiger'. Steps for activating sleep settings in other versions of OS X will be very similar. Click on the apple symbol (Apple Menu) in the upper left of your screen. Go to 'System Preferences' Click 'Show All' (if necessary) Select 'Energy Saver' from the 'Hardware' row. Then hit enter then type rsync -p -o path to the file you want to backup /usb Tip: You can find the files listed in a specific directory by typing ls -la path to directory Eg.ls -la /Users/home-directoryname/Desktop. After the process is complete you can check if the files are there on your pendrive by typing ls -la /usb. Mac OS X doesn’t have an obvious way to view the exact text based path to a folder (otherwise known as a directory) in the finder window. You can have it show a graphical path, but getting just the text based path to a directory (for use in the Terminal for example) requires a couple of extra steps. Use the “Go to Folder” Menu Option. You may want to reveal a file path on Mac direct from the Finder window. To do this, you can use the “Go to Folder” option. To start, open a Finder window in whatever manner you choose. Once it’s open, navigate to the toolbar at the top, then click the “Go” menu.

Both local and user sites then loaded. After which, I was able to delete the duplicated file and everything now works without issue. Just to be clear, leave the original file index.html.en where it is, untouched and unharmed throughout this step.

Not sure why I had to take this mysterious detour - probably something local to my machine, but if you're having trouble after following the guide above, see if it helps.

May 4, 2013 11:51 PM

The default layout for installed Haskell components follows the conventions of most unix-like systems. On Mac OS X, this layout isn't optimal, and a different layout is used. The layout presented here has several advantages:

Follows Apple's Guidelines for file system layout
Makes it easy for a user to locate all the Haskell components, especially user installed packages
Enables easy removal of a user installed package, whether they have installed it --user or --global.
Facilitate creation of unified, hyper-linked Haddock documentation, optionally with source

Haskell Platform 2011.2.0.0 (March 2011) and later uses this layout and sets up cabal to use it for built packages. On new installs, if you didn't already have a ~/.cabal/config file, then it is set up by default. Otherwise, the config file for this layout is placed in ~/.cabal/config.platform and you can manually move it over, or incorporate it into your existing config file.

Implementations

Haskell implementations are generally installed for use by all accounts on thesystem. They consist of large collections of executables, libraries, and otherfiles. These are packaged using Apple's framework, versioning, and bundlingtechniques and installed in:

For example, GHC 7.0.2 is installed in:

Executables intended for use from the command line, are be symlink'd into:

[Q: Would /usr/local/bin be more appropriate? ]

Packages that come with the implementation, are be located within the Frameworkbundle.

If the implementation has any GUI applications, these are installed in:

NB: These guidelines allow for multiple implementations and multipleversions to co-exist. (With the exception of multiple versions of GUI applicationswhich can only be done by distinct naming, and the symlinks in /usr/binwhich can achieved in the normal way: Append the version number to the executableand then symlink the 'bare' name to the most recent.

If implementations want to be able to be installed 'per user', then the abovepaths should be:

Not all software for Mac OS X offers a 'per user' option on installation, and whilenice, it is by no means universal.

User Installed Packages

User installed packages are placed under a 'prefix' that depends on if the userchoose to install for all users (--global) for just their own use (--user):

Package Component Layout

Cabal offers a large amount of flexibility in where the various pieces of a packageare installed. The GHC package system is rather agnostic about where these pieces are,and insulates the implementation from such differences. These combine to enable thechoice of package layout to be largely to serve the user.

For both --global and --user installs, this is the recommended package layout on Mac OS X:

This can be achieved with the following cabal configuration defaults:

N.B.:

Cabal configuration files don't actually support ~. You must replace that with /Users/xxx where xxx is your account name.
All packages for a given compiler are under a single directory. When an old compiler is removed, all the packages compiled for it can be easily removed too.
All components for a package are under a single directory. This facilitates easy location and removal of a single package, for either a single compiler, or all installed versions.
If a package generates different doc for different compilers (it may have different APIs available), then this structure preserves each.
Executables are also per compilation, which is sometimes important (for Haddock, for example).

Executables