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Here’s a quick guide on how to clean junk files on Mac. We’ll go over types of junk you might have on your Mac and why it’s there, as well as ways of getting it removed. Why would you want it removed (apart from the desire to keep your Mac clean)? Because junk not only takes up space, it slows your Mac down, and it’s usually the reason behind system glitches and errors. In other words, getting rid of it is all around a great idea.
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This guide will help you to clean all the extra junk on your Mac’s operating system and breathe new life into your Mac.
What are user cache files and how to remove them?
After removing the devices in Xcode and then running $ xcrun simctl delete unavailable the disk space used by the platforms are still the same, although the list of simulated devices has decreased. Android apache C dev efficiency gadget hardware java latex Linux living Mac ml Music mysql reading security shell shortcut time management tools tor video VirtualBox windows Xcode Recent Posts Visual Studio run unit tests for x64 only.
- Oct 19, 2015 At this point the simulator should be running fine with your application. Open the Safari Mac OS application on your Mac and enable the Develop menu if it hasn’t already been enabled. This can be done in Safari’s advanced preferences: With the Develop menu enabled, you can now connect to the iOS simulator.
- If the only two directories you have in Library/Developer are Xcode and Docsets (or Shared/Docsets) then you should be safe to delete that folder. If you did re-install XCode you would get them (or updated versions) back. Xcode 3.2.6 and iOS 4.3 SDK installation problem on Mac OS X Lion.
- 0 libswiftCore.dylib 0x10240ccec 1 ChocolateChip 0x1020d966c 2 ChocolateChip 0x1020d6c7c 3 UIKit 0x18b41a2e8 10 UIKit 0x18b446cfc.
- Description Template app crashes when the -optimize=experimental-xforms-product-type additional mtouch argument is used along with the Link Framework SDKS linker option. This argument is used to avoid an Apple App Store warning about UI.
Ultimately you'll find the Users//Library/Developer/CoreSimulator/Devices folder where you can have little concern about deleting all those 'devices' using iOS versions you no longer need. It's also safe to just delete them all, but keep in mind you'll lose data that's written to the device like sqlite files you may want to use as a backup version.
The user cache files are usually app files that are stored on your Mac. These are various temporary files that are meant to speed the performance of the Apple software. Caching data is essential for Macs that use wired internet connection. But, by caching for a long time, your Mac accumulates lots of files, which can affect its performance. So, it’s better to clean your Mac of them and help it run faster.
Here’s how to clean junk files on Mac and remove user cache:
- Open Finder.
- Press Command+Shift+G.
- Enter the following command into the field and select Go:
~/Library/Caches
. - In the window that appears, you will see all your cache files.
- Press Command+A to select all files and delete them. Press Command and click on the folders you want to delete if you don’t want to remove all files at once.
- In the pop-up that appears, you’ll need to enter your user name and password.
If you still see folders in Caches, maybe you have some windows open. In other cases, there will be no cache files left.
What are system log files and how to remove them?
Every Mac has system log files stored deep inside its memory. Mac saves and stores system log files mainly for developers to diagnose errors and problems with macOS and system applications when they occur. These logs are plain text files, so they usually don’t take up a lot of storage. But, when you’re running out of free space, deleting even such small files may help you declutter your Mac.
It’s important to note, though, that cleaning system log files manually, you may accidentally delete some essential data. So, make sure to back up your data to avoid heartache when you delete something important. Using safe cleaning tools notarized by Apple, like CleanMyMac X, can help you prevent the risks of removing valuable data.
So, to clean system junk on your Mac, do the following:
- Open Finder.
- From the Go menu, select Go to folder.
- Enter the
/var/log
in the field and select Go. - You will see all the system log files. Select the files you want to remove and drag them to the Bin.
You can also find system log files in /Library/Logs
. This folder contains system application logs that aren’t essential to store.
If you go to /Library/Logs/DiagnosticReports
, you will find system reports. Safely delete the files to keep your Mac clean and free of clutter.
How to remove user log files?
When your app crashes, you usually are asked to submit a bug report. The system gathers your user logs and includes them in a report. The user log files don’t contain information on user activity as it may seem. They only deal with app-level functionality.
If your Mac is old, you probably have a lot of user logs. So, it’s time to clean your machine of them.
Follow the instructions to delete user log files on your Mac:
- Open Finder.
- Press Command+Shift+G.
- Enter the following command in the field and press Go:
~/Library/Logs
. - You will see all the system log files. You can manually move the files from folders to Bin.
If you want to declutter your Mac fully, select all user log files and delete them.
How to delete language files?
Thanks to localization and language files, you can set your apps to the language you prefer. But once you determined the language of the app, you may delete other language files. These files are usually stored inside application packages, so many users don’t even have the faintest idea they exist on their Macs.
If you wonder how to delete junk files on Mac, you may start by removing the language files:
- Open Finder and go to the Applications folder.
- Right-click any application icon and select Show Package Contents.
- Find the Resources folder and open it.
- All subfolders ending with “lproj” are language files. Each folder contains localization information on a particular language. For example, the folder named en.lproj comprises English language files.
- Select the language folders and move them to Bin.
Don’t forget to empty the Bin, when you’re done removing junk files from your Mac.
How to remove Xcode junk?
If you use Xcode, tons of your disk space gets hogged with old cache and junk that Xcode consumes. You might not even notice it until it impacts your Mac’s performance. In case you would like to go over all the libraries to remove Xcode junk manually, here’s a list of paths you need:
~/Library/Developer/Xcode/DerivedData
~/Library/Developer/Xcode/Archives
~/Library/Developer/Xcode/iOS DeviceSupport
~/Library/Developer/CoreSimulator
~/Library/Caches/com.apple.dt.Xcode
~/Library/Application Support/MobileSync/Backup
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Important notice: we do not assume responsibility for the possible damage or loss of data that might occur when you manually clean Xcode libraries. Thus, venture this path on your own risk. Or use CleanMyMac X, because it knows exactly how to clean Xcode cache, traces, and leftovers and does it neatly, leaving all the important files intact.
How to remove junk files on your Mac with CleanMyMac X?
We already mentioned CleanMyMac X as a universal cleaning solution for your Mac. So how to clean system junk on your Mac with CleanMyMac X's System Junk module?
- Download CleanMyMac X for free here.
- Launch it and select System Junk from the list of features on the left.
- Click Scan.
- After the scan is done, click Review Details.
- Check the boxes opposite to User Cache Files, System Cache Files, Language Files, and other items you want to delete.
- Hit Clean.
Now your Mac is as good as new! CleanMyMac X deletes junk files, including user cache, system logs, downloads, and even Xcode junk files all at once to speed up your Mac and free it from clutter.
Although each system file or user log doesn’t seem to take much of your Mac’s storage, together, they can make it difficult for your Mac to perform well. That’s why it’s better to scan your machine for junk files and get rid of them once in a while.
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The OS X operating system combines a stable core with advanced technologies to help you deliver world-class products on the Mac platform. Knowing what these technologies are, and how to use them, can help streamline your development process, while giving you access to key OS X features.
At a Glance
This guide introduces you to the range of possibilities for developing Mac software, describes the many technologies you can use for software development, and points you to sources of information about those technologies. It does not describe user-level system features or features that have no impact on software development.
OS X Has a Layered Architecture with Key Technologies in Each Layer
It’s helpful to view the implementation of OS X as a set of layers. The lower layers of the system provide the fundamental services on which all software relies. Subsequent layers contain more sophisticated services and technologies that build on (or complement) the layers below.
The lower the layer a technology is in, the more specialized are the services it provides. Generally, technologies in higher layers incorporate lower-level technologies to provide common app behaviors. A good rule of thumb is to use the highest-level programming interface that meets the goals of your app. Here is a brief summary of the layers of OS X.
The Cocoa (Application) layer includes technologies for building an app’s user interface, for responding to user events, and for managing app behavior.
The Media layer encompasses specialized technologies for playing, recording, and editing audiovisual media and for rendering and animating 2D and 3D graphics.
The Core Services layer contains many fundamental services and technologies that range from Automatic Reference Counting and low-level network communication to string manipulation and data formatting.
The Core OS layer defines programming interfaces that are related to hardware and networking, including interfaces for running high-performance computation tasks on a computer’s CPU and GPU.
The Kernel and Device Drivers layer consists of the Mach kernel environment, device drivers, BSD library functions (
libSystem
), and other low-level components. The layer includes support for file systems, networking, security, interprocess communication, programming languages, device drivers, and extensions to the kernel.
Relevant Chapters:Cocoa Application Layer, Media Layer, Core Services Layer, Core OS Layer, Kernel and Device Drivers LayerOpen library in mac.
You Can Create Many Different Kinds of Software for Mac
Using the developer tools and system frameworks, you can develop a wide variety of software for Mac, including the following:
Apps. Apps help users accomplish tasks that range from creating content and managing data to connecting with others and having fun. OS X provides a wealth of system technologies such as app extensions and handoff, that you use to extend the capabilities of your apps and enhance the experience of your users.
Frameworks and libraries. Frameworks and libraries enable code sharing among apps.
Command-line tools and daemons. Command-line tools allow sophisticated users to manipulate data in the command-line environment of the Terminal app. Daemons typically run continuously and act as servers for processing client requests.
App plug-ins and loadable bundles. Plug-ins extend the capabilities of other apps; bundles contain code and resources that apps can dynamically load at runtime.
System plug-ins. System plug-ins, such as audio units, kernel extensions, I/O Kit device drivers, preference panes, Spotlight importers, and screen savers, extend the capabilities of the system.
Relevant Chapter:Creating Software Products for the Mac Platform
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When Porting a Cocoa Touch App, Be Aware of API Similarities and Differences
The technology stacks on which Cocoa and Cocoa Touch apps are based have many similarities. Some system frameworks are identical (or nearly identical) in each platform, including Foundation, Core Data, and AV Foundation. This commonality of API makes some migration tasks—for example, porting the data model of your Cocoa Touch app—easy.
Other migration tasks are more challenging because they depend on frameworks that reflect the differences between the platforms. For example, porting controller objects and revising the user interface are more demanding tasks because they depend on AppKit and UIKit, which are the primary app frameworks in the Cocoa and CocoaTouch layers, respectively.
See Also
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Apple provides developer tools and additional information that support your development efforts.
Xcode, Apple’s integrated development environment, helps you design, create, debug, and optimize your software. You can download Xcode from the Mac App Store.
For an overview of the developer tools for OS X, see the Xcode Apple Developer webpage. For an overview Xcode functionality, read Xcode Overview.
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The OS X Developer Library contains the documentation, sample code, tutorials, and other information you need to write OS X apps. You can access the OS X Developer Library from the Apple Developer website or from Xcode. In Xcode, choose Help > Documentation and API Reference to view documents and other resources in the Organizer window.
In addition to the OS X Developer Library, there are other sources of information on developing different types of software for Mac:
Apple Open Source. Apple makes major components of OS X—including the UNIX core—available to the developer community. To learn about Apple’s commitment to Open Source development, visit Open Source Development Resources. To learn more about some specific Open Source projects, such as Bonjour and WebKit, visit Mac OS Forge.
BSD. Berkeley Software Distribution (BSD) is an essential UNIX-based part of the OS X kernel environment. Several excellent books on BSD and UNIX are available in bookstores. But you can also find additional information on any of the websites that cover BSD variants—for example, The FreeBSD Project.
Third-party books. Several excellent books on Mac app development can be found online and in the technical sections of bookstores.
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