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MacZip 1.0.5
A free Macintosh version of Info-ZIP's Zip and UnZip
By Dirk Haase, email: <d_haase@sitec.net>
Home page: <www.sitec.net/maczip>
Mirror page: <www.haase-online.de/dirk/maczip>
Contents
Introduction
License
Hardware and system requirements
Installation
Memory requirements
Note on terminology
Stopping MacZip
Using MacZip
Decompressing files and folders
Compressing files and folders
Method 1 - Drag and Drop for compressing one
file or one folder
Method 2 - Drag and Drop for compressing
multiple files or folders
Method 3 - Using the dialog box for
compressing multiple files or folders
Naming files
Limitations, problems, bugs
Introduction
This file is a mini-manual to provide a quick start for
users who need only the basic features of MacZip. For
further information about MacZip, please see the file called
"README.TXT" and the other documentation.
MacZip is a cross-platform tool for compressing and
decompressing files. It includes two sub-programs: Zip
(for compression) and UnZip (for decompression).
Use MacZip to compress files and folders on a Macintosh.
The results can be decompressed on Unix, VMS, MSDOS, OS/2,
Windows 9x, Windows NT, Atari, Macintosh, Amiga, Acorn RISC
OS, and other systems.
Use it also to decompress zipped "archives" produced on non-
Macintosh systems.
MacZip can process archives produced by PKZIP. PKZIP and
PKUNZIP can work with archives produced by Zip. MacZip's
sub-program Zip version 2.2 is compatible with PKZIP 2.04.
MacZip is completely separate from the shareware compression
program ZipIt, which handles files in a different way.
MacZip can usually decompress files compressed by ZipIt, but
you may sometimes get unsatisfactory results. The same may
apply to files compressed by Aladdin's DropZip or Marco
Bambini's SmartZip.
The user interface is very simple. It was not my intention
to make a full-blown user interface. However I think it is
comfortable enough to use as a regular tool.
MacZip is available in two versions. One version supports
encryption and decryption. The name of this package
includes "c". The other version doesn't support encryption
or decryption: the name of its package includes "nc". If
you are in the US and you wish to send a copy of MacZip to
someone outside the US, you should send the "nc" version
because under US legislation it is unlawful to export
encryption software from the US.
License
Copyright (c) 1990-2000 Info-ZIP. All rights reserved.
MacZip can be used without payment or registration, but its
use is subject to some conditions. See the accompanying
file LICENSE, version dated March 25, 2000 or later, for
terms of use. If that file is missing, the license may also
be found on MacZip's Help menu, and at:
<ftp://ftp.freesoftware.com/pub/infozip/license.html>.
Hardware and system requirements
MacZip requires at least System 7 and a Macintosh with a
minimum of a Motorola 68020 or PowerPC 601 processor. Other
configurations may work but it has not been tested on all.
Installation
Put MacZip wherever you like on your hard drive, for
instance in your Applications folder or your Utilities
folder.
For easy access, make an alias of MacZip and keep the alias
on your desktop. This makes it very quick and easy to use
the Drag and Drop method of compressing and decompressing
files. If you don't want to keep an alias for MacZip
permanently on your desktop, an alternative is to make an
alias of the folder containing MacZip, and put that alias on
your Apple menu.
This version of MacZip also supports Apple events, so you
can install it in your web browser as a helper application.
Memory requirements
The RAM requirement for MacZip is set at 12000K - see the
Get Info panel for MacZip. This large memory allocation is
needed only if you will be compressing large numbers of
files. For compressing only a few files, you can reduce the
"preferred size" of the memory to 1048K. If you use MacZip
only for decompression, you can reduce the "preferred size"
of the memory to 600K.
Note on terminology
In standard English, the word "archive" means a collection
of documents or other records, and using the word to mean a
copy of just one item is a kind of nonsense. In computer
terminology, "archive" is used jargonistically to mean a
particular type of computer file containing compressed
copies of one or more other computer files. It is used here
in its jargon sense.
Stopping MacZip
You can stop the run of Zip/Unzip with the well-known
shortcut [Command] + [.].
Using MacZip
Decompressing files and folders
Drag the icon of the archive you want to decompress, and
drop it on the icon of MacZip. The archive needs to be of
the "Zip" type, and will normally have a name ending in
".zip". If all is well, MacZip's icon will be highlighted
and MacZip will launch automatically.
A window called "Messages of Zip" will open showing
information about the decompression, and will close as soon
as the decompression has been successfully completed. If
the window remains open, it means that MacZip encountered a
problem. The window will display information about the
problem.
The decompressed version of the archive will be placed in a
new folder, next to the compressed copy.
MacZip will quit automatically when the decompression has
been successfully completed.
Note: You cannot drop more than one item at the same time.
Compressing files and folders
Method 1 - Drag and Drop for compressing one file or one
folder
If you only want to compress one file, or one folder
containing several files, the quickest and easiest way is to
use Drag and Drop.
Drag the icon of the file or folder you want to compress,
and drop it on the icon of MacZip. MacZip's icon will be
highlighted and MacZip will launch automatically.
A window called "Messages of Zip" will open showing
information about the compression, and will close as soon as
the compression has been successfully completed. If the
window remains open, it means that MacZip encountered a
problem. The window will display information about the
problem.
The compressed version of the file or folder will be placed
next to the original uncompressed copy. It will have the
same name, with the addition of the suffix ".zip".
MacZip will quit automatically when the compression has been
successfully completed.
Note: You cannot drop more than one item at the same time.
The Drag and Drop method has one minor disadvantage if the
compressed file or folder is going to be decompressed on a
non-Macintosh computer. Macintosh files have what are
called resource forks. Resource forks don't make sense
outside the Macintosh world, and they have to be disposed
of. If Drag and Drop has been used to compress files, a
recipient who decompresses them on a different kind of
computer is liable to get extra items called "XtraStuf.mac".
These have no function, and the recipient should discard
them.
Method 2 - Drag and Drop for compressing multiple files or
folders
If you want to compress multiple files or folders into a
single compressed archive, you can do it by using Drag and
Drop.
However, you cannot drop more than one item at the same
time, so you must first create a new folder to enclose all
the files and sub-folders that you want to compress.
Move all the files and folders that you want to compress
into the new folder, and drag and drop the new folder on the
icon of MacZip. It will be compressed as described in
Method 1 above.
When the compression is complete, you will probably want to
move the individual files and folders back to their previous
locations. If you don't want to move files and folders
about in this way, consider using Method 3 below.
Method 3 - Using the dialog box for compressing multiple
files or folders
This method is useful -
* If you want to compress multiple files into a new
single compressed archive, but you don't want to have to
move files and folders as described for Method 2 above.
* In any situation where you want to add additional files
to an existing compressed archive. This might apply if you
have already compressed a large number of files and find you
want to add a few extra items. You can use this method to
add extra items to an archive that was originally created by
using Drag and Drop.
* If you want to tell MacZip to disregard the resource
forks of Macintosh files. This avoids a minor problem if
the files are to be decompressed on a different type of
computer.
You start by compressing one file or folder, or by selecting
an existing compressed archive. Then you use the dialog box
to add further items.
1. Launch MacZip, e.g. by double-clicking its icon, or by
double-clicking its alias. If you want to add files to an
existing archive, continue by following steps (4) and (5)
below. If you want to create a new archive, continue by
following steps (2) to (5) below.
2. Pull down the File menu and choose "Zip (compress
files)". A window called "Zip Options" will appear.
3. Click the button called "Location of the compressed
File". Then -
(a) Type a name for the new archive. Navigate to
locate and open the folder where you want to save the new
archive. Then click "Select".
(b) You'll be returned to the "Zip Options" window.
Click the button called "File or Folder to compress".
Navigate to locate the first file or folder you want to
include in the compressed archive, click on its name to
highlight it, and click "Select".
(c) You'll be returned to the "Zip Options" window.
Click the button called "Start Zip".
(d) A window called "Messages of Zip" will open showing
information about the compression. If MacZip has
encountered a problem, this window will display information
about the problem.
4. To add files to an existing archive, including an
archive you have just created by following steps (2) and (3)
above, you need to add each successive file or folder
separately. Pull down the File menu and choose "Zip
(compress files)". A dialog box called "Zip Options" will
appear. Click the button called "Location of the compressed
File". Then -
(a) Navigate to locate the compressed archive you want
to add the extra files to, click on its name to highlight
it, and click "Select".
(b) You'll be returned to the "Zip Options" window.
Click the button called "File or Folder to compress".
Navigate to locate the next file or folder you want to add
to the compressed archive, click on its name to highlight
it, and click "Select".
(c) You'll be returned to the "Zip Options" window.
Click the button called "Start Zip".
(d) A window called "Messages of Zip" will open showing
information about the compression. If MacZip has
encountered a problem, this window will display information
about the problem.
5. Repeat step 4 for each additional file or folder that
you want to include.
Resource forks. An advantage of the dialog box method is
that it gives you the option to exclude the resource forks
of files being compressed. Resource forks are a feature of
the Macintosh operating system. They don't make much sense
outside the Macintosh world, and they cause a minor problem
if the files are to be decompressed on a different type of
computer. You can exclude the resource forks from the
compression by checking a checkbox in the "Zip Options"
Window. This window appears when you choose "Zip (compress
files)" from the File menu. Check the checkbox called "-df
Data fork only." The checkbox reverts to its unchecked
state when the compression is complete, so you need to check
it anew each time you want to use this feature.
A disadvantage of the dialog box method is that MacZip
ignores the outermost folder of each item that you add to
the archive. Let's say that you have two separate folders,
each containing two files. You start by compressing Folder
1. Then you use the dialog box method to add Folder 2.
When the result is decompressed, you will find that the four
files are all present - but they are all contained in a
single folder.
Naming files
If you are adding files or folders to an existing archive,
i.e. by using Method 3 above, you may need to ensure that
file names are unique. This applies to the files being
added to the archive - it doesn't apply to files that are
not being added. If you have compressed Folder 1 containing
two files called A and B, and then add Folder 2 whose two
files are also called A and B, you are liable to find that
MacZip doesn't add the files from Folder 2, because it
"knows" that the archive already contains A and B. In
addition, the files called A and B already in the archive
may be wiped clean.
If you are compressing files or folders which will be
decompressed on a non-Macintosh computer, there's another
point you may want to bear in mind. Macintosh file-names
can cause difficulties for other computer systems. If you
like, you can leave it to MacZip to handle this problem. It
will alter the names of files to reasonably suitable
alternatives. You may prefer to control the process
yourself. In that case it's a good idea to find out in
advance whether the recipient would like the files to be
named in a particular way. For instance, the recipient may
ask you to adopt the "8.3" naming system. In this system,
the file-name consists of up to 8 characters for the name
itself, followed by a dot (period) and a 3-character suffix.
It's also wise to avoid non-standard characters in the names
of files destined for other types of computers. You will
avoid complications if you stick to the characters A-Z and
a-z, the numerals 0-9, and dots (periods).
In the "8.3" naming system, the suffix "txt" is used for
text files, while the suffix "zip" is used for compressed
files. When MacZip compresses files, it will automatically
add ".zip" to the name of the compressed archive.
Limitations, problems, bugs
MacZip 1.0.5 cannot handle aliases and therefore ignores
them.
If you have two volumes (disks, etc.) with the same name,
and try to compress or decompress using one volume as the
source and the other as the destination, MacZip won't be
able to do it. You'll get an error message. The solution
is to make sure that all your volumes have unique names.
Encrypted files in a compressed archive are occasionally
corrupted. In this case MacZip presents an error message
saying "invalid compressed data to inflate".
Date and time stamps on compressed files may be inaccurate
if the Map Control Panel is incorrectly set. If this is
important to you, please see the file "README.TXT" for
advice on dealing with this aspect.