# Latex in Mac does not recognise certain packages

I installed MacTex, Tex Live utility and I edite in TexMaker.

The thing is that I installed many packages through Tex Live (almost all of them), and when I use some of them such as:

\usepackage{helvetic} in the preambule,

Latex comes out saying:

Why does it say that if I have them installed through Tex Live?

Thanks a lot!

• Welcome to TeX-sx! I've never heard of `helvetic` as a LaTeX package: do you have a reference for it? It's not on CTAN so is not in TeX Live. – Joseph Wright Jan 5 '15 at 21:58
• Do you want t use helvet.sty? – knut Jan 5 '15 at 22:01
• Can you compile a basic document without any packages? – Alan Munn Jan 5 '15 at 22:05
• Thanks for welcoming :) In Tex live I have the list of all packages and Helvetic is one of them. It says "Installed" in the Tex Live program. However, it does not seem to work. I am not entirely sure of what I did, but after I pressed "Update all" in Tex Live, I have used around 10 gb of space in my hard drive between MacTex, Tex Live and all the packages... but after all it looks like I can't use some of them :S. PS: helmet.sty does work, but it does not appear in Tex Live list. – Pablo Jan 5 '15 at 23:09
• @JosephWright Different senses of 'package': `helvetic` is a TeX Live package but there is no LaTeX package by this name... The pieces of it are on CTAN... – cfr Jan 5 '15 at 23:51

There are 2 notions of packages here and they are not the same.

First, there is the TeX Live idea of a package, such as `helvetic`. Here is what the TeX Live Manager has to say about it:

``````\$ tlmgr info helvetic
package:     helvetic
category:    Package
shortdesc:   URW "Base 35" font pack for LaTeX.
longdesc:    A set of fonts for use as "drop-in" replacements for Adobe's basic set, comprising: - Century Schoolbook (substituting for Adobe's New Century Schoolbook); - Dingbats (substituting for Adobe's Zapf Dingbats); - Nimbus Mono L (substituting for Abobe's Courier); - Nimbus Roman No9 L (substituting for Adobe's Times); - Nimbus Sans L (substituting for Adobe's Helvetica); - Standard Symbols L (substituting for Adobe's Symbol); - URW Bookman; - URW Chancery L Medium Italic (substituting for Adobe's Zapf Chancery); - URW Gothic L Book (substituting for Adobe's Avant Garde); and - URW Palladio L (substituting for Adobe's Palatino).
installed:   Yes
revision:    31835
sizes:       run: 2377k
relocatable: Yes
cat-date:    2012-06-06 22:57:48 +0200
collection:  collection-fontsrecommended
``````

Second, there is the LaTeX sense of a 'package' which you can load to use in your document using

``````\usepackage{helvet}
``````

In some cases, there may be a package in both senses. But, in others, there will not be. `helvetic` provides the fonts but there is no LaTeX package by that name, as you have discovered. That is, `helvetic` is not identical with the LaTeX package which you need to use those fonts in your document. `helvet` is the LaTeX package which you need for that.

`helvet` is provided by the TeX Live package `psnfss`:

``````\$ tlmgr info psnfss
package:     psnfss
category:    Package
shortdesc:   Font support for common PostScript fonts.
longdesc:    Font definition files, macros and font metrics for freely- available Adobe Type 1 fonts. The font set consists of the 'LaserWriter 35' set (originally 'freely available' because embedded in PostScript printers), and a variety of other free fonts, together with some additions. Note that while many of the fonts are available in PostScript (and other) printers, most publishers require fonts embedded in documents, which requires that you have the fonts in your TeX system. Fortunately, there are free versions of the fonts from URW (available in the URW base5 bundle). The base set of text fonts covered by PSNFSS are: AvantGarde, Bookman, Courier, Helvetica, New Century Schoolbook, Palatino, Symbol, Times Roman and Zapf Dingbats. In addition, the fonts Bitstream Charter and Adobe Utopia are covered (those fonts were contributed to the Public Domain by their commercial foundries). Separate packages are provided to load each font for use as main text font. The packages helvet (which allows Helvetica to be loaded with its size scaled to something more nearly appropriate for its use as a Sans-Serif font to match Times) and pifont (which provides the means to select single glyphs from symbol fonts) are tailored to special requirements of their fonts. Mathematics are covered by the mathptmx package, which constructs passable mathematics from a combination of Times Roman, Symbol and some glyphs from Computer Modern, and by Pazo Math (optionally extended with the fpl small-caps and old-style figures fonts) which uses Palatino as base font, with the mathpazo fonts. The bundle as a whole is part of the LaTeX 'required' set of packages.
installed:   Yes
revision:    33946
sizes:       src: 73k, doc: 521k, run: 441k
relocatable: Yes
cat-version: 9.2a
cat-date:    2012-07-23 15:04:13 +0200