MTU stands for Maximum Transmission Unit, and a larger MTU size generally increases efficiency of a network connection because each packet carries more data, but sometimes the default MTU sizes (often 1500) will cause issues with some networks and needs adjusting. Changing the MTU size has been a solution to some dropping wi-fi connections in … Read More
The command line interface is an alternate method of interacting with OS X, relying on text based command entry to execute commands and perform tasks. It is accessed on the Mac by using the Terminal application. Generally, the command line is considered advanced, and thus it’s usage tends to be more complex than many standard procedures on a Mac.
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Converting images to new file formats is very easy thanks to a variety of tools built directly into OS X (and most Linux distributions). Though the easiest method uses Preview for converting images, there’s a command line option that uses the same sips tool we’ve discussed before to perform batch resizing from the command line. … Read More
Retrieving a list of preferred wireless networks can be helpful when troubleshooting wi-fi problems. The following trick will do just that, and it’s similar to a tip we covered recently which showed how to see a list of previously connected wi-fi networks using either System Preferences or a lengthy command line string, but as far … Read More
Knowing which wireless networks a Mac has been connected to in the past be can be helpful for a variety of reasons, including network troubleshooting, determining where a Mac has been, if a specific wifi password is recoverable, and a myriad of other technical reasons. Searching for past networks is completely different from finding currently … Read More
If you accidentally permitted an app to gain access to things like your personal contacts list or location, or you’d just like to start over again and have granular control over which applications can access certain data, you can use the command line tool tccutil in OS X 10.8 and later. Think of the tccutil … Read More
If you’re a frequent command line user, you’re likely to have found the history command to be quite useful before, whether it’s for discovering your most frequently used commands, dumping history and searching it to find specific past commands, listing all defaults commands used, or whatever else. That said, there are some obvious situations where … Read More
The command line is often considered the realm of advanced users, but that doesn’t mean every usage of Terminal has to involve rocket science. This collection of terminal tips should apply to a wide variety of Mac users, and everyone from beginners to advanced users should find something worthwhile here.
Advanced Mac users may have noticed that X11 is no longer bundled with OS X, and it’s also no longer available as a separate installation option through Developer Tools. Instead, to run X11 on OS X Mountain Lion (and later), you’ll want to download and install the free XQuartz system, which bundles all the necessary … Read More
Though most Mac users will likely prefer to use Preview to batch resize images because of the ease of use, advanced users often like to go with the command line for repetitive tasks. We’ve discussed sips before as a way to resize, rotate, and flip images, but if sips is combined with wildcards it can … Read More
The quickest way to add a file extension to a group of files that don’t currently have one is by using the command line in Mac OS X. In the example below, we’ll add a “.txt” extension to all files in a single directory, but subbing .txt in the command string will add a different … Read More
To compare and list the different contents of two directories without the extra output you get through commands like diff, you can use the comm command instead. To get started, launch Terminal and type the following command, adjusting the directory paths as appropriate: comm -3 <(ls -1 folder1) <(ls -1 folder2) The output listed will … Read More
Time Machine backups can be triggered remotely thanks to SSH (Remote Login) and the command line. This is an excellent solution to use if you left the home or office without making an important backup, though the SSH requirement does add a potential layer of complexity that may make it more appropriate for advanced users. … Read More