My Macbook Pro Retina 15 Inch late 2013 Big Sur crashes everytime I connect WiFi

next, try Safe mode:

Safe Mode does a number of different things.

On older Intel Macs, hold shift at startup, but have your userid and password at the ready.

On newer Apple silicon Macs, shut down your Mac. Then as you start up again, hold the power key until the ’Startup Options’ screen appears.

A parade of unusual things happens.

• Your Mac loads just enough of the kernel to do a disk check. Then it proceeds to do a disk check. This can take an extra about five minutes.

• your userid and password are required, even if you normally auto-login. So have them handy.

• Your Mac adds ONLY a minimal set of Apple-Only extensions, Not including graphics acceleration extensions. Screen updates will therefore be wonky and slow, but it ultimately should be correct.

• Your Mac assumes defaults for as many settings as possible, including screen resolution. This is the key for re-setting the screen, but there is a little more to it: Resolution is likely to be temporarily lower and settings ordinary. Use this as a starting point to customize settings to your liking.

If you make NO changes, regular mode will just revert to what you had set before, so DO make changes!

Any changes you make in Safe Mode will "stick" in regular mode after you restart.

• after a Restart in normal mode, your Mac will take slightly longer to start up [once] because it rebuilds some system caches.

"Works in Safe mode, fails in regular mode" implies "It's something you added".

How to use Safe Mode on your Mac

Start up your Mac in safe mode - Apple Support

You have 12 crashes due to memory-allocator-detected RAM memory corruption. Since memory access is protected, this is very difficult to attribute to badly-behaving software. You likely have a RAM memory problem.

Every time you restart MacOS, some of the major modules load point addresses are semi-randomized, as a hedge against fixed-address malware attacks. this means that a memory problem may move into a different part of memory can cause somewhat differs wonky symptoms. since RAM is soldered to the mainboard, it cannot be replaced or upgraded.

It's time to think seriously about getting a newer computer.

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Your Time Machine last backup date is not shown. Is your backup up to date? it needs to be as recent as possible.

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That said, there are some items that raise concerns, and fixing some of them might improve stability.

 Unsigned files - There are unsigned software files installed. These files could be old, incompatible, and cause problems. They should be reviewed.

Unsigned Files:

  Running app: /Library/DropboxHelperTools/Dropbox_u501/dbkextd

    Details: Domain name invalid - possibly malware

 [Not Loaded] com.google.keystone.daemon.plist (Not signed - installed 2023-12-06)

    <Empty>

  [Not Loaded] com.google.keystone.xpcservice.plist (Not signed - installed 2023-12-06)

    <Empty>

  [Not Loaded] com.dropbox.dropboxmacupdate.agent.plist (Not signed - installed 2025-07-01)

    <Empty>

[Not Loaded] com.dropbox.dropboxmacupdate.xpcservice.plist (Not signed - installed 2025-05-30)

    <Empty>

you have Cody kreiger's gfxCardStatuss installed. Most users load this when their Discrete graphics chip dies.

But you are also running Chrome, the biggest resource hog that is not obvious malware, which tends to turn on Discrete graphics always. If you can find a way to stop using Chrome, you should. Chrome is NOT benign.

You have a number of obsolete and discredited performance enhancers loaded:

Kernel Extensions:

  /Applications/Smart Switch/SmartSwitch.app

    [Not Loaded] ssuddrv.kext - com.devguru.driver.SamsungComposite (1.6.1 - SDK 10.9)

  /Library/Extensions

    [Not Loaded] Soundflower.kext - com.Cycling74.driver.Soundflower (1.6.6 - SDK 10.6)

    [Not Loaded] FTDIUSBSerialDriver.kext - com.FTDI.driver.FTDIUSBSerialDriver (2.2.18 - SDK 10.6)

    [Not Loaded] hp_io_enabler_compound.kext - com.hp.kext.io.enabler.compound (3.4.0)

    [Loaded] EnergyDriver.kext - com.intel.driver.EnergyDriver (3.7.0 - SDK 10.14)

    [Not Loaded] JMicronATA.kext - com.jmicron.JMicronATA (1.1.6)

    [Not Loaded] CUDA.kext - com.nvidia.CUDA (1.1.0)

  [Running] com.crystalidea.macsfancontrol.smcwrite.plist (Ilya Parniuk - installed 2025-01-04)

    Executable: /Library/PrivilegedHelperTools/com.crystalidea.macsfancontrol.smcwrite

with the possible exception of sound flower, and hp_io_enabler if you have an HP Printer, the rest of those appear to be junk.

'Junk' in this context is stuff that may be perfectly good, but you do not need right now, like stuff stored in the attic.

you appear to hav BOTH Docker and podman installed. one or the other should suffice.

are you still using VirtualBox? if not, it should be un-installed

App cleaners have no place on any modern Mac. I am happy to explain further, just ask:

  [Not Loaded] AppCleaner Helper (Julien Ramseier - installed 2025-08-31)

    Modern Login Item

    /Applications/AppCleaner.app/Contents/Library/LoginItems/AppCleaner Helper.app

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Performance:

  System Load: 16.85 (1 min ago) 11.62 (5 min ago) 5.18 (15 min ago)

  Nominal I/O usage: 9.34 MB/s

  File system: 32.13 seconds

  Write speed: 569 MB/s

  Read speed: 699 MB/s

Even the most affordable Apple-silicon Mac has drive read/write speeds over about 2000 MB/s. Drive speed can have tremendous impact in overall speed of everything you do on your Mac.

<< While in Safe Mode and connected to Wi-Fi, the laptop did not crash. >>

"Works in Safe mode, fails in regular mode" implies "It's something you added".

Consider downloading and running this little "discovery" utility, Etrecheck. It changes NOTHING. Etrecheck was developed by a senior contributor here, and uses mostly system calls and simple tests to collect often-needed information.

it contains little tests for speeds of devices, CPU utilization, memory usage, energy usage and a digest of recent problems, in one easy to use package. it does not even need to be Installed. Because less can be learned when your Mac is running great, best time to run is when your problems are actually occurring, if possible.

if you follow the directions faithfully, its report (pre-laundered of all personally-identifiable information) can be "Shared" to the System ClipBoard, then Pasted into an ‘Additional Text’ window in a reply on the forums.

Use Etrecheck Pro for free:

http://Etrecheck.com

The amount of data you get can be daunting. If you POST your report, some Readers here are willing to look over those reports, and can provide valuable insights.

Then start a reply on the forums, click the "additional text" icon, and PASTE

<< Finally, although the performance has improved a lot, it doesn't explain why the laptop functions normally under LAN but crashes under WiFi, which, by the way, still exists!! The problem, unfortunately till now still there! >>

Your computer likely has a RAM Memory fault, based on some of the diabolical errors it was getting before. The bad memory cells end up near the same location, but not in exactly the same location after each Restart, so the observed symptoms may change.

yes.

Use only Ethernet and do not enable Wi-FI, and if Wi-Fi turns on after a Restart, quickly turn it off.

The most obvious is to replace that computer with one that does not have faulty RAM memory. The most inexpensive MacBook Air performs faster than any Intel-based Mac. Be sure to add enough RAM memory for the kind of work you do.

Install and Un-Install

the fundamental principles:

• anything installed with drag-and-drop to the /Applications folder can be un-installed by Drag-and-drop to the Trash. After a restart, the Trash can be emptied.

• anything installed with a complex installer program requires the manufacturer's un-installer program. sometimes this is included as an "option" in the Installer package, but the software-maker's web site should specify how to un-install (if they don't, they get swamped with users clamoring for Un-install Instructions).

DO NOT use any other web site’s instructions, unless you have complete trust in that specific site to tell you the truth.

Third-party un-installers could be malicious. The Classic case is malicious updaters for Flash Player.

• anything claiming to be an 'uninstaller helper' is just JUNK. (worse than web site click-bait)

Remember that you can not immediately DELETE anything hat is part of the running MacOS, because if it were referenced after being deleted, your Mac would crash. What you can often do is Move to Trash, and after a Restart, the item will no longer be part of the running MacOS and the Trash can be emptied..

If your device has network connectivity issues, ...