What Cuases Read Timeout On Downloads For Mac Os

/ Comments off



A kernel panic message from a Linux system
Kernel panic in Ubuntu 13.04 (Linux 3.8) in Oracle VM VirtualBox

A kernel panic (sometimes abbreviated as KP[1]) is a safety measure taken by an operating system's kernel upon detecting an internal fatal error in which it either is unable to safely recover or cannot have the system continue to run without having a much higher risk of major data loss. The term is largely specific to Unix and Unix-like systems. For Microsoft Windows operating systems the equivalent term is 'Stop error', resulting in a bug check[2] screen that presents the bug check code on a blue background in early versions of Windows (colloquially known as a 'Blue Screen of Death' or BSoD), or on a green background on the Xbox One platform as well as in Windows 10 preview builds.[3]

Osx

The kernel routines that handle panics, known as panic() in AT&T-derived and BSD Unix source code, are generally designed to output an error message to the console, dump an image of kernel memory to disk for post-mortem debugging, and then either wait for the system to be manually rebooted, or initiate an automatic reboot.[4] The information provided is of a highly technical nature and aims to assist a system administrator or software developer in diagnosing the problem. Kernel panics can also be caused by errors originating outside kernel space. For example, many Unix operating systems panic if the init process, which runs in user space, terminates.[5][6]

History[edit]

Download macOS Catalina. MacOS Catalina gives you more of everything you love about Mac. Experience music, TV, and podcasts in three all-new Mac apps. Your system is configured to download updates from a private server, not from Apple. That server isn't working or isn't reachable. If you're bound to a network directory server, or if you're behind a firewall that doesn't allow downloading updates directly from Apple, your network administrator has to solve the problem. Download Mac OS X Yosemite. The OS X Yosemite 10.10.5 update improves the stability, compatibility, and security of your Mac, and is recommended for all users.

The Unix kernel maintains internal consistency and runtime correctness with assertions as the fault detection mechanism. The basic assumption is that the hardware and the software should perform correctly and a failure of an assertion results in a panic, i.e. a voluntary halt to all system activity.[7] The kernel panic was introduced in an early version of Unix and demonstrated a major difference between the design philosophies of Unix and its predecessor Multics. Multics developer Tom van Vleck recalls a discussion of this change with Unix developer Dennis Ritchie:

I remarked to Dennis that easily half the code I was writing in Multics was error recovery code. He said, 'We left all that stuff out. If there's an error, we have this routine called panic, and when it is called, the machine crashes, and you holler down the hall, 'Hey, reboot it.'[8]

The original panic() function was essentially unchanged from Fifth Edition UNIX to the VAX-based UNIX 32V and output only an error message with no other information, then dropped the system into an endless idle loop.

Source code of panic() function in V6 UNIX:[9]

As the Unix codebase was enhanced, the panic() function was also enhanced to dump various forms of debugging information to the console.

Causes[edit]

A panic may occur as a result of a hardware failure or a software bug in the operating system. In many cases, the operating system is capable of continued operation after an error has occurred. However, the system is in an unstable state and rather than risking security breaches and data corruption, the operating system stops to prevent further damage and facilitate diagnosis of the error and, in usual cases, restart.[10]

After recompiling a kernel binary image from source code, a kernel panic while booting the resulting kernel is a common problem if the kernel was not correctly configured, compiled or installed.[11] Add-on hardware or malfunctioning RAM could also be sources of fatal kernel errors during start up, due to incompatibility with the OS or a missing device driver.[12] A kernel may also go into panic() if it is unable to locate a root file system.[13] During the final stages of kernel userspace initialization, a panic is typically triggered if the spawning of init fails. A panic might also be triggered if the init process terminates, as the system would then be unusable.[14]

The following is an implementation of the Linux kernel final initialization in kernel_init():[15]

Operating system specifics[edit]

Linux[edit]

Kernel panic as seen on an iKVM console

Kernel panics appear in Linux like in other Unix-like systems, but they can also generate another kind of error condition, known as a kernel oops.[16] In this case, the kernel normally continues to run after killing the offending process. Searching for words in a text on mac keyboard. As an oops could cause some subsystems or resources to become unavailable, they can later lead to a full kernel panic.

On Linux, a kernel panic causes keyboard LEDs to blink as a visual indication of a critical condition.[17]

macOS[edit]

When a kernel panic occurs in Mac OS X 10.2 through 10.7, the computer displays a multilingual message informing the user that they need to reboot the system.[18] Prior to 10.2, a more traditional Unix-style panic message was displayed; in 10.8 and later, the computer automatically reboots and displays a message after the restart. The format of the message varies from version to version:[19]

  • 10.0–10.1: The system displays text on the screen, giving details about the error, and becomes unresponsive.
  • 10.2: Rolls down a black transparent curtain then displays a message on a white background informing the user that they should restart the computer. The message is shown in English, French, German and Japanese.
  • 10.3–10.5: The kernel panic is almost the same as version 10.2 but the background of the error screen is black.
  • 10.6–10.7-10.8: The text has been revised and now includes a Spanish translation.
  • 10.9 and later: The computer becomes unresponsive before it immediately reboots. When the computer starts back up, it shows a warning message for a few seconds about the computer restarting because of a kernel panic, and then the computer restarts back up. The message now includes a Chinese translation.

Sometimes when there are five or more kernel panics within three minutes of the first one, the Mac will display a prohibitory sign for 30 seconds, and then shut down (this is known as a 'recurring kernel panic').

In all versions above 10.2, the text is superimposed on a standby symbol and is not full screen. Debugging information is saved in NVRAM and written to a log file on reboot. In 10.7 there is a feature to automatically restart after a kernel panic. In some cases, on 10.2 and later, white text detailing the error may appear in addition to the standby symbol.

  • Mac OS X 10.0–10.1 kernel panic

  • Mac OS X 10.2 kernel panic

  • Mac OS X 10.3–10.5 kernel panic

  • Mac OS X 10.6 and 10.7 kernel panic

  • Message shown after the computer restarts because of a kernel panic in OS X 10.8 and later versions

See also[edit]

Wikimedia Commons has media related to Kernel panic.

References[edit]

  1. ^'KP - Kernel Panic (Linux) | AcronymFinder'. www.acronymfinder.com. Retrieved January 6, 2016.
  2. ^'Bug Checks (Blue Screens)'. Hardware Dev Center - Microsoft.
  3. ^Hoffman, Chris. 'Did You Know Windows 10 Has a Green Screen of Death?'. How-To Geek. Retrieved June 4, 2020.
  4. ^'FreeBSD 11.0 - man page for panic (freebsd section 9) - Unix & Linux Commands'. www.unix.com.
  5. ^'boot failure-init died - Unix Linux Forums - HP-UX'. www.unix.com.
  6. ^Randolph J. Herber (September 1, 1999). 'Re: PANIC: init died'. Newsgroup: comp.sys.sgi.admin.
  7. ^Daniel P. Siewiorek; Robert S. Swarz (1998). Reliable computer systems: design and evaluation. A K Peters, Ltd. p. 622. ISBN978-1-56881-092-8. Retrieved May 6, 2011.
  8. ^'Unix and Multics'. www.multicians.org.
  9. ^Source code /usr/sys/ken/prf.c from V6 UNIX
  10. ^Steven M. Hancock (November 22, 2002). Tru64 UNIX troubleshooting: diagnosing and correcting system problemsHP Technologies SeriesITPro collection. Digital Press. pp. 119–126. ISBN978-1-55558-274-6. Retrieved May 3, 2011.
  11. ^Michael Jang (2006). Linux annoyances for geeks. O'Reilly Media, Inc. pp. 267–274. ISBN978-0-596-00801-7. Retrieved April 29, 2011.
  12. ^David Pogue (December 17, 2009). Switching to the Mac: The Missing Manual, Snow Leopard Edition. O'Reilly Media, Inc. p. 589. ISBN978-0-596-80425-1. Retrieved May 4, 2011.
  13. ^Greg Kroah-Hartman (2007). Linux kernel in a nutshell. O'Reilly Media, Inc. p. 59. ISBN978-0-596-10079-7. Retrieved May 3, 2011.
  14. ^Wolfgang Mauerer (September 26, 2008). Professional Linux Kernel Architecture. John Wiley and Sons. pp. 1238–1239. ISBN978-0-470-34343-2. Retrieved May 3, 2011.
  15. ^linux/init/main.c, LXR Cross Referencer
  16. ^'Linux Device Drivers, Chapter 4'(PDF).
  17. ^James Kirkland; David Carmichael; Christopher L. Tinker; Gregory L. Tinker (May 2006). Linux Troubleshooting for System Administrators and Power Users. Prentice Hall. p. 62. ISBN9780132797399. Retrieved February 5, 2016.
  18. ^'OS X: About kernel panics - Apple Support'. support.apple.com.
  19. ^'A New Screen of Death for Mac OS X'. OSXBook.com.
Retrieved from 'https://en.wikipedia.org/w/index.php?title=Kernel_panic&oldid=994016783'

Deleting downloads on Mac can be a pain because It involves two separate things: cleaning up your Downloads folder and then removing the downloads history from your browser. So, in short, you'll need to: find your Downloads folder, remove your downloads, clear your downloads history in your browser, and (finally) empty your Trash.

How to delete downloads on Mac via Finder

Finder is the first place you should look for downloads in on your Mac. If you have a mountain of download files stored, it’d be smart to sort your items and see which of them are the heaviest.

  1. Open Finder.
  2. Press Cmd+Shift+G.
  3. Type in: ~/
  4. Open Downloads folder.
  5. Righ-click anywhere in the window and select Use Groups.
  6. Finder will then gather your downloads in groups such as Applications, PDF documents, Images, and others, so you can quickly look through them and delete files you don’t need.

Then you can sort downloads by size: right-click in Finder, click Group By pop-up menu and choose Size.

If you want to remove multiple downloads from your Mac at once, you can do that with CleanMyMac X. This app has a Large and Old Files feature that detects all massive files and lets you delete them all. I will explain how to quickly get to downloads on your Mac using CleanMyMac X later in the article. You'd be surprised at how many GB of space you can reclaim!


How to delete downloads from software (e.g. Skype) which are hard to find

It can be a challenge to find the files you downloaded from different apps, such as Skype, on your Mac. By default, all the items you want to save go into the Downloads folder. But, if you have changed these settings, your files would be stored elsewhere. So, how to find those downloads on your Mac.

If you search for Skype downloads, here’s how to locate them:

  1. Open Skype.
  2. Go to the Skype menu and choose Preferences.
  3. Select Messaging from the list on the left.

In the end, there’s “When I receive a file” setting. It’s set to Downloads, which means all files you download from Skype automatically go into this folder. Open it to locate the files Skype saved and delete them. You can change directory to save your Skype files elsewhere.

The pretty similar route applies to all other apps you save files from. For example, to find out the Slack downloads location, I opened the app and then navigated to its Preferences.

To make it easier to find files you saved, choose one download location for all your apps. You will eliminate clutter in lots of folders and will be able to delete many files at once.

Out

What Causes Read Time Out On Downloads For Mac Osx

Once you’re done deleting your downloads, it’s time to clear the downloads history from the browser you use. Select the section below based on the browser you use.

The easy way to delete large and old files on Mac

However, if you’re looking for a solution that makes clearing out your large downloads (including your Skype downloads history) simple, check out a cleaning utility like CleanMyMac X.

Large and Old Files feature scans your storage for heavy files piling up on your Mac for a long time. It shows how much space each file takes and helps to quickly get rid of all old documents, .dmg files, and archives that clutter your storage.

Large and Old Files helps you clean up your Downloads folder with just a few clicks. Here's how to clear old downloads on your Mac:

10.10
  1. Download the free version of CleanMyMac X.
  2. Install and launch the app.
  3. Click Large & Old Files.
  4. Scan your Mac and then select whatever you wish to remove.
  5. Click Remove.

And you’re done. As you can see, it’s incredibly easy to remove your downloads on Mac with CleanMyMac X.

But, if you’d still like to clean up your downloads and download history manually, just follow the steps below.

How to delete old .DMG files on Mac

On macOS, the majority of apps you download come in .dmg format. Tomtom map meta keygen generator macro. '.dmg' is a disk image that contains a compressed download file. These files work like hard drives: they can be mounted and ejected.

What Causes Read Time Out On Downloads For Mac Os High Sierra

When you open the .dmg file, you’ll see the application you’re about to install. After installing the application (dragging it to the Applications folder), the .dmg file will stay on your Mac until you delete it. Imagine how many .dmg files you may have unintentionally stored on your Mac. Now, let’s see how to delete them.

Hack fx factory mac. First, you need to eject those .dmg files that are still open.

  1. Open Finder.
  2. Under the Locations you will see the list of all .dmg files.
  3. Press the Eject icon to eject a disk image.

To delete .dmg files:

  1. Open Finder.
  2. Type “.dmg” in the search field and press Return.
  3. Move the unneeded files to the Trash.

What Causes Read Time Out On Downloads For Mac Os Catalina

Voila! Now, your Mac is much cleaner.

How to clear downloads history in Chrome

To clear downloads history in Google Chrome browser manually:

  1. Launch the Chrome browser.
  2. Type chrome://history/ in the search field and press Enter.
  3. Select Clear browsing data.
  4. Select the time range and check the 'Download history' box.
  5. Click Clear data.

How to clean downloads history in Safari

To clean downloads history in Safari browser:

  1. Launch the Safari browser.
  2. Click View in the menu bar and select Show Downloads.
  3. Safari will show you all the files you downloaded. Press Clear to remove downloads history.

You can alternatively press the arrow down button (↓) to see and clear downloads.

Clearing your Mac of downloads once in a while helps to save some space. If you are up to a full spring cleaning of your MacBook, CleanMyMac X has another useful feature — Space Lens. It analyses your storage and shows precisely how much space each folder takes. If your Mac is short on space, Space Lens can help you to locate the heaviest folder and remove it. Download the app for free, to try it yourself!

How to remove downloads history in Firefox

To remove downloads history in Firefox directly:

What Causes Read Time Out On Downloads For Mac Os 10.10

  1. Launch the Firefox browser.
  2. Click History, in the menu bar.
  3. Select Clear Recent History.
  4. Select the time range.
  5. Check the “Browsing & Download History” box.
  6. Click Clear Now.

Now, your Mac is probably clean of old downloads that used to take space. Keeping your digital space tidy and organized will help you locate files faster and avoid clutter in your folders.

These might also interest you: