How do i compress large files on a mac

You'll need all of the parts to extract the original files, so make sure you don't lose any of them. You can also type in a custom size. Each part will be the size you designated, with the last part being whatever is left over. WinRAR - In the General tab of the "Archive name and parameters" menu, use the "Split to volumes, size" drop-down menu to select the size you want each part to be. You can also type in custom sizes, and use the second drop-down menu to designate the unit byte, kilobyte, megabyte, etc.

Archiver - Click the "Split" button in the Archiver menu after adding a file.

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Set the size that you want each part to be. You can then set the compression settings for the file. Method 2. Download Avidemux. This is a free, open source video editor that allows you to easily compress and convert your video files. You can download it from fixounet. It is available for Windows, Mac, and Linux. Videos are large chunks of data that don't compress well when added to an archive using the method above.

Instead, you'll want to re-encode it using Avidemux, which will lower the file size considerably at the cost of some quality. Movie files that you've downloaded from online sources may already be compressed. Further compression can lead to a virtually unwatchable final product, or may not result in significant size changes.

It is not possible to uncompress a compressed video. You should always save the compressed version as a separate file so that you don't lose the original. Launch Avidemux and load the video file. It may take a few moments for the video to load. This is the most compatible format for your converted video.

This will compress the audio track of the video to keep the size down. This will ensure that the video plays on the most devices possible. Click the. Configure button in the "Video Output" section. Find the "Rate Control" section of the. General tab.

macos - Extract large zip file (50 GB) on Mac OS X - Super User

Select "Video Size" from the drop-down menu. Enter in the target size for the converted video. Avidemux will adjust its settings to get as close to your target size as possible, but it may end up slightly over or slightly under the target size.

Note that setting the target size significantly smaller than the original size will result in a drastic decrease in quality. Click the "Save Video" button. You will be prompted to enter a name for the video, and then the conversion and compression process will begin. Depending on the length of the video and the quality settings, this could take quite some time to complete. Method 3. Understand what can be compressed.

Most images that you download online are already compressed. The file formats. Compression for images is most useful if you are working with images directly from a digital camera or. It is not possible to uncompress a compressed image.

How to Compress (Zip) Files and Folders

Understand the difference between "lossless" and "lossy" compression. There are essentially two types of compression for images: Lossless compression is for cases where you need an exact replication of the original, and is typically used for drawings, diagrams, and medical imaging. Lossy compression is for cases where a drop in quality won't be noticed as much, and is most commonly used for photographs.

Open the image in the editor of your choice. Nearly all image editors support compression by allowing you to save the image as a different file format. When you choose a compressed format, you'll be given options to determine how much compression to use.

How to Make a Zip Archive in Mac OS X

Virtually any image editing program will work, though some will give you more quality options than others. This will allow you to save a copy of the original image using a new format. If you're using Paint or another basic image editor, you will need to use the "Save As" option instead. Select your desired format from the "Type" menu. The format you choose has a lot to do with the nature of the image. Update Well, I had made the wrong decision to compress the files, and it's already too late.

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Peter Mortensen 8, 16 61 Note that assuming the photos were JPEGs then zip or any other lossless compression won't actually compress them much if at all. The amount of time spent archiving all those was probably greater than simply copying them over as individual files. Is this question still active? How did you create the 50 GB zip file in the first place? From the Finder or the command line on OS X?

I was in the same situation when backing up a 12GB directory. I fixed it by using the ditto command which was readily available with the OS X Yosemite installation: This should be the accepted answer. No need to install extra software and works perfectly.

Compress a PDF in Preview on Mac

I do a bit of work with modern. This is the best solution. I just used this to unzip a 14GB data file that 'unzip' would not process. Just a note that p7zip referenced in another answer can open some large zip archives created by other platforms that ditto will read as corrupt. I have no idea why Apple didn't ship an unzip that matches the shipped zip, but I found two easy solutions: MacPorts users can install unzip 6.

BetterZip solved my problem, thx! I was getting errors for a large Zip file as well. I'd suggest adding The Unarchiver as an option too.

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If you use Homebrew, you could install 7zip with: You can then extract the file with: Probably goes without saying, but port install p7zip if you use macports. Note the whitespace between the "7z" and "x", maybe you can insert a line break tremby. Really don't think that's necessary. It's in a monospace font. I'd have to escape the line break if I added one. Also, is there an unzip command standard in the Mac OS X command prompt? SuperMagic SuperMagic 5 5. So I guess this is worth mentioning: If a single file is being zipped, the zip archive will maintain the standard file name but append the.

This works in all versions of OS X, and you can access the compress item option from a right-click with a mouse, control-click with keyboard, or two-finger click on a trackpad from the Mac. Opening zip files is even easier, all you need to do is just double-click on the archive and it will expand automatically with Archive Utility in the same folder the archive is stored in. Not interested in using the standard Finder and file system approach?

iZip Features

Enjoy this tip? Subscribe to the OSXDaily newsletter to get more of our great Apple tips, tricks, and important news delivered to your inbox! Enter your email address below:. That is for 10mb files like: Look at tar gzip bzip etc. Thank you for your article. I am a college student and have bought my very first Mac lab top. Your article was very useful for me always being a windows user. Thanks, I needed these simple instructions! I used to use Stuffit, but now I can just right click.

You can easily peer into […]. Please help me. The amount of compression you get depends on the data. MS Office and above use XML for the documents which is already very compact so compression may not save you much. What program ie, terminal command is executed for right-click compress? I know I can use zip, tar, etc. I tried to compress my ppt file, but it just reduced the size from 59MB to 47MB.

Is there a better way to compress more so that I can send by email? Thanks a lot! Name required. Mail will not be published required. All Rights Reserved. Reproduction without explicit permission is prohibited.