Dropbox Desktop App on Mac OS X 10.11.

I have had this problem on OS 10.9.5, but I wanted to give it a try, so I installed the beta version (after removing the app and all its related files), and it still crashes with the same errors as it did after the advanced reinstall of the regular version:

the first attempt to run produces:

Crashed Thread: 3 Dispatch queue: com.apple.root.default-priority

Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000010

VM Regions Near 0x10:
-->

every subsequent attempt produces: 

Crashed Thread: 0 CrBrowserMain Dispatch queue: com.apple.main-thread

Exception Type: EXC_CRASH (SIGSEGV)
Exception Codes: 0x0000000000000000, 0x0000000000000000

I see however that the beta version is from June 18th, so as recent as the time when the standard version of the app started crashing. I will try with an older backup, start dropbox while off the network, and see whether that at least allows the app to start without crashing.

I downloaded and installed an older version of Dropbox (49.4.68). It started up without problems, and kept working for a couple of minutes, i.e. until the app updated itself to the latest version. This is the best performance so far in 5 days, because the app finally started, I could log into my account, and start the syncing. Too bad that there is no way to prevent it from updating itself during syncing. As soon as the app updated itself to 52.4.58, it crashed.

As far as I am concerned, the latest version (52.4.58) has a bug.

Same issue for me. Dropbox 52.4.58 crashes on my MBP. This appeared after I upgraded MacOS to 10.11.6 a few days ago.

Here's the error log from Console:

Process: Dropbox [1638]
Path: /Applications/Dropbox.app/Contents/MacOS/Dropbox
Identifier: com.getdropbox.dropbox
Version: 52.4.58 (52.4.58)
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: Dropbox [1638]
User ID: 501

Date/Time: 2018-06-27 09:29:20.977 +0200
OS Version: Mac OS X 10.11.6 (15G21013)
Report Version: 11
Anonymous UUID: 07CA0835-A2CC-64BA-9980-B020DDD1B7BD

Sleep/Wake UUID: 30C227F0-9CB7-484C-A30D-8FD4139CB8D6

Time Awake Since Boot: 1100 seconds
Time Since Wake: 710 seconds

System Integrity Protection: enabled

Crashed Thread: 0 CrBrowserMain Dispatch queue: com.apple.main-thread

Exception Type: EXC_CRASH (SIGSEGV)
Exception Codes: 0x0000000000000000, 0x0000000000000000

Thread 0 Crashed:: CrBrowserMain Dispatch queue: com.apple.main-thread
0 libsystem_kernel.dylib 0x00007fff94f6ff72 mach_msg_trap + 10
1 libsystem_kernel.dylib 0x00007fff94f6f3b3 mach_msg + 55
2 com.apple.CoreFoundation 0x00007fff8d499114 __CFRunLoopServiceMachPort + 212
3 com.apple.CoreFoundation 0x00007fff8d4985dc __CFRunLoopRun + 1356
4 com.apple.CoreFoundation 0x00007fff8d497e28 CFRunLoopRunSpecific + 296
5 com.apple.HIToolbox 0x00007fff92247935 RunCurrentEventLoopInMode + 235
6 com.apple.HIToolbox 0x00007fff9224776f ReceiveNextEventCommon + 432
7 com.apple.HIToolbox 0x00007fff922475af _BlockUntilNextEventMatchingListInModeWithFilter + 71
8 com.apple.AppKit 0x00007fff881aedf6 _DPSNextEvent + 1067
9 com.apple.AppKit 0x00007fff881ae226 -[NSApplication _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 454
10 com.apple.AppKit 0x00007fff881a2d80 -[NSApplication run] + 682
11 com.dropbox.Tungsten 0x000000010b45f92a 0x10b458000 + 31018
12 org.chromium.ContentShell.framework 0x000000010bd37e56 0x10bc00000 + 1277526
13 org.chromium.ContentShell.framework 0x000000010bd37444 0x10bc00000 + 1274948
14 org.chromium.ContentShell.framework 0x000000010bd6dfe3 0x10bc00000 + 1499107
15 org.chromium.ContentShell.framework 0x000000010bd5d69d 0x10bc00000 + 1431197
16 com.dropbox.Tungsten 0x000000010b45f935 0x10b458000 + 31029
17 libffi.6.dylib 0x0000000107422994 ffi_call_unix64 + 76
18 libffi.6.dylib 0x0000000107421cd1 ffi_call + 1249
19 objc._objc.cpython-35m-darwin.so 0x0000000107b694a3 PyObjCFFI_Caller + 1875
20 objc._objc.cpython-35m-darwin.so 0x0000000107b7e316 0x107b52000 + 181014
21 libdropbox_python.3.5.dylib 0x0000000106720f85 PyObject_Call + 101
22 libdropbox_python.3.5.dylib 0x00000001067e92d3 PyEval_EvalFrameEx + 24563
23 libdropbox_python.3.5.dylib 0x00000001067edea2 0x106713000 + 896674
24 libdropbox_python.3.5.dylib 0x00000001067ee780 0x106713000 + 898944
25 libdropbox_python.3.5.dylib 0x00000001067e8fd3 PyEval_EvalFrameEx + 23795
26 libdropbox_python.3.5.dylib 0x00000001067ee702 0x106713000 + 898818
27 libdropbox_python.3.5.dylib 0x00000001067e8fd3 PyEval_EvalFrameEx + 23795
28 libdropbox_python.3.5.dylib 0x00000001067edea2 0x106713000 + 896674
29 libdropbox_python.3.5.dylib 0x00000001067ee780 0x106713000 + 898944
30 libdropbox_python.3.5.dylib 0x00000001067e8fd3 PyEval_EvalFrameEx + 23795
31 libdropbox_python.3.5.dylib 0x00000001067edea2 0x106713000 + 896674
32 libdropbox_python.3.5.dylib 0x00000001067ee780 0x106713000 + 898944
33 libdropbox_python.3.5.dylib 0x00000001067e8fd3 PyEval_EvalFrameEx + 23795
34 libdropbox_python.3.5.dylib 0x00000001067ee702 0x106713000 + 898818
35 libdropbox_python.3.5.dylib 0x00000001067e8fd3 PyEval_EvalFrameEx + 23795
36 libdropbox_python.3.5.dylib 0x00000001067edea2 0x106713000 + 896674
37 libdropbox_python.3.5.dylib 0x00000001067e32be PyEval_EvalCodeEx + 78
38 libdropbox_python.3.5.dylib 0x000000010674a6fd 0x106713000 + 227069
39 libdropbox_python.3.5.dylib 0x0000000106720f85 PyObject_Call + 101
40 libdropbox_python.3.5.dylib 0x000000010672142e PyObject_CallMethod + 318
41 libdropbox_bootstrap.dylib 0x0000000104928434 df_run + 257
42 com.getdropbox.dropbox 0x00000001043f3b33 0x1043f2000 + 6963
43 libdyld.dylib 0x00007fff80df25ad start + 1

The latest suggestion I got from the Dropbox support team appears to work for me (at least so far I haven't had another crash - I'm talking about 15 minutes, but better than anything else I had tried until now):

"The development team has released a new beta version of the Dropbox desktop application just yesterday that we think may resolve the issue you are experiencing.

If you would like, you can download this version of the Dropbox desktop application from the following link:

https://www.dropboxforum.com/t5/Desktop-client-builds/Beta-Build-53-3-65/m-p/282044#M4928

If this resolves the issue, you should be able to continue using this version as it will update automatically to the next available build going forward."

I think the problem is now fixed for me. The app shows up in the menu bar, and About Dropbox indicates I'm on version 52.4.60 (I did download the latest install yesterday, but can't tell which version of Dropbox it is...)