-1
votes
1answer
16 views

OS X software to compress images and reduce their size [on hold]

I have a hundred images sized 0.8 MegeBytes, resolution 640x1200. I need a software tool to compress them to 0.1 Megabytes or even less and decrease resolution, What software tools are there for this ...
0
votes
2answers
29 views

What could have gone wrong when compressing a very big directory on OSX? The resulting zip won't decompress

When working with the edition of a movie, I was out of space on my HD so I temporarily compressed a very big directory to a zip file and removed the original as a way to get some extra space. I did it ...
0
votes
0answers
58 views

Unzip speed on Mac versus Linux

I have a zip file that contains 200mb of data, compressed to an 80mb .ZIP file. Basically it's a website with thousands of files, including code and images, no video. The file was zipped on a linux ...
0
votes
0answers
64 views

How to compress 2 (apple) disk images of different backups of the same drive?

So I have backed up my Macintosh HD at different instances to DMG files. I would like to compress them but when I try to make an archive it simply compresses each image, without recognizing the ...
0
votes
1answer
206 views

Differences between DMG and various Zip-like formats?

For my everyday work, I have a few DMG files that I keep on cloud storage. At the beginning of the day, I download my DMGs, convert them from Compressed to Read/Write using Disk Utility (OSX). At ...
2
votes
2answers
183 views

Does OS X Preview support saving PDF with JBIG2 compression?

I have a PDF file containing hundreds of BW scannings, that I created on Windows using lossy JBIG2 compression, resulting in a nice 8MB file. I can open that file on OSX with Preview, but if I add ...
2
votes
1answer
1k views

Does OS X support disk compression?

I am new to the Mac world. As you may know, NTFS has options to "Compress this drive to save disk space" or "Compress contents to save disk space". I want to know whether OS X supports this feature ...
1
vote
3answers
397 views

What is the equivalent unix command to a Mac OSX “Compress” menu action?

When I right-click a file in Mac OSX and select "Compress 'File Name'", what is the equivalent bash or terminal command to get the same result? Is it just gzip -9 /path/to/filename?
1
vote
1answer
1k views

How do I compress multiple files into one archive using lzma?

Looking at the options of xz and lzma, I can't for the life of me figure out how to compress multiple files into one archive. I know it is possible because I've uncompressed a .lzma file and it opened ...
1
vote
2answers
4k views

Compress files from OS X terminal?

In the Finder, there is this wonderful ability to right click on a file or directory, select compress from the drop-down, and end up with a zipped file. Is it possible to do the same thing from the ...
1
vote
1answer
163 views

Is it possible to compress without duplication?

Is there a way to compress a set of files without duplicating them (i.e., I want to choose 'compress' and see the files I want compressed disappear into a zip file or other format). I ask because I ...
-1
votes
3answers
2k views

Compress MP3 downloaded from the web?

I recently downloaded a bunch of raw audio streams from the web as MP3s and I realize now that they're huge! 60 MB a song… I would like to compress these, but the other question similar to mine links ...
0
votes
1answer
285 views

Create a zip file that doesn't create a folder when opened, Mac OS X

I am wondering if there is any way of easily creating a zip file that contains a bunch of files. However, when I double-click to open this zip file, I do not want it to create a subdirectory with the ...
0
votes
2answers
1k views

Advanced file compression software for Mac OSX

Back when I used Windows, I always used WinRAR for file compression and decompression. It had a fair amount of options like 'just storage' vs 'hard compression', password protection and archive type. ...
1
vote
2answers
5k views

How to extract .arc files

I downloaded a software from the internet which is in .arc format. How can I extract the files on MAC? The arc file is 4GB, but I believe it will be 30 GB when extracted.
0
votes
1answer
1k views

Unzip an archive that was split into 2 files

I have 2 zip files that were split using: zip -r -s 15 my_file.zip my_file.pdf Now I have 2 files: my_file.zip my_file.z01 How can I unzip them? Doing unzip my_file.zip I get: Archive: ...
10
votes
4answers
5k views

Mac OS X not reporting directory sizes correctly?

In Finder, I've noticed that if I duplicate some .app files (in the Applications folder), Finder will show that the duplicate .app file is not the same size as the original. This file size ...
2
votes
2answers
5k views

Untar a given linux tarball on MAC OS X

I have a Linux tarball that can't be unpacked. It gives me an unexpected error. I am told this is due to case insensitive on MAC OS X. How can I untar this file? tar -zxvf file.tar.gz ... x ...
2
votes
1answer
303 views

How do I compress multiple videos for the web using a Mac?

I'm uploading some videos to Google + and it's taking forever! So I'd like to compress the videos so they don't take so long to upload. I am aware that quicktime has a compression feature to upload ...
5
votes
2answers
6k views

What is the fastest compression method for a large number of files?

I need to compress a directory with around 350,000 fairly small files that amount to about 100GB total. I am using OSX and am currently using the standard "Compress" tool that converts this directory ...
1
vote
2answers
4k views

How can I compress .mov files to fit on DVD-Rs on Mac OS X?

I'm running Mac OS X 10.6 and have a few large .mov files (around 20-30GB each) that I would like to burn onto separate data DVD-Rs. The resolution of the videos is 960x540 and the duration ranges ...
4
votes
1answer
518 views

Decompressing these .gz files gives strange/unexpected results, can you get it working?

I have a collection of mailing list archive files all gzip'd, they're in a nested directory structure that starts with what appears to be a blank folder/jargon name. The files are here: ...
0
votes
1answer
170 views

OS X compressed files on a Windows machine

I sent myself a compressed folder from my OS X machine to my Windows machine. When I opened it I of course got the __MACOSX folder, but the contents were in an extension-less file of about the right ...
1
vote
2answers
6k views

Compress a folder into multiple zip files

I'm on mac osx. 1. Is there any tool to compress a folder into multiple zip files ? 2. Is there any tool to split a compressed zip file into smaller zip files (to open individually later) ? thanks
1
vote
2answers
9k views

Stuffit expander free on Mac OS 10.4.11

Just two questions: Does it exist? Which version of stuffit expander is surely working on this version of mac os x? I've been trying to download the 10.3 to 10.3.9 version from allume website but ...
1
vote
1answer
128 views

Backing up external drives

I have a WD 320GB external drive and a WD 1TB external drive. I would like to backup my 320GB on a regular basis. I have tried using the built in compressor in mac, but that fails saying unable to ...
18
votes
5answers
14k views

Compressing folders on a mac, without the .DS_Store

Is there anyway to get rid of the .DS_Store when compressing a folder on a mac? I work on a mac and send work to clients in zip format, but always get questioned on the .DS_Store folder inside them. ...
2
votes
2answers
1k views

Creating/extracting RAR files on Mac OS X

I would like to be able to create RAR files easily on Snow Leopard with some sort of GUI utility. I know that RARlabs maintains a Mac version of the RAR command line utility, but I don't want to have ...
0
votes
4answers
5k views

tar.gz won't extract on Mac OS X

Why is this not working? sh-3.2# tar -xzf postgresql-7.4.28.tar.gz gzip: stdin: not in gzip format tar: Child returned status 1 tar: Error exit delayed from previous errors
14
votes
5answers
39k views

Command to 'gzip' a folder?

I am new to Mac command prompt stuff. How do you create a gzip of a folder in Mac OS X? I was told by a few folks that if you want to create a gzip of a folder you should 'tar' it first and then ...
17
votes
6answers
20k views

Is it possible to open a self-extracting compressed Windows file on a Mac?

If I have a compressed file that's stored as a self-extracting archive for Windows, i.e., a .exe file, is it possible to convert it to a zip file that can be unzipped under OS X? Alternatively, is ...
5
votes
3answers
2k views

What file compression application is the most space-efficient?

I have a bunch of directories that I want to keep, but I also want to clear out storage on my drive. What is the most efficient (in terms of compression ratio) compression application? I don't care ...
5
votes
8answers
4k views

Winrar-like archive utility for OS X

I've been a Mac user for about 1.5 years and so far enjoyed the experience. But one thing I miss from other operating systems is the lack of compression/decompression utilities that follow the ...
4
votes
5answers
7k views

How to set Mac OS X's Default Compression Format?

Mac OS X uses zip as it's default compression format. It makes this conveniently available from the contextual menu (control-click/right-click). I'd like to adjust this default to bzip2. I can do ...
37
votes
8answers
38k views

What’s a good way to extract .rar files on the Mac? [closed]

Anything built-in? (E.g. command line tools.) Any well-regarded software? Update: I like The Unarchiver, but vote up your favourite, or add it as an answer if it isn’t there.
23
votes
4answers
38k views

Create a tar file for compressing files and directories on Mac OS X

I'm new to Mac OS X and am not sure how to do this: I have three directories. I want to create a tar/zip file of them so that I can attach them to an email. Any ideas?