dmg files won't mount, app store app fails

Quite suddenly, we're unable to open dmg files, or install software with App Store on three Mac Minis in 3 locations.

Thanks in advance for any solutions or insights.

Below are three events in the log, occurring after trying to mount a dmg:

One, occurring after the mount:

7/9/16 7:21:57.902 PM mdworker[1475]: [19:21:57.900] FigAtomStreamInitWithByteStreamWithSize signalled err=-12893 (kFigAtomStream_OffsetOutsideOfParent) (Offset exceeds stream length) at /Library/Caches/com.apple.xbs/Sources/CoreMedia_frameworks/CoreMedia-1731.15.20 4/Sources/Utilities/FigAtomStream.c line 305

A few seconds earlier (And there's one more paste below this):

7/9/16 7:21:09.041 PM CoreServicesUIAgent[741]: Error -60005 creating authorization

7/9/16 7:21:09.000 PM kernel[0]: hfs: summary table not allowed on FS with block size of 2048

7/9/16 7:21:09.000 PM kernel[0]: hfs: could not initialize summary table for Dropbox Installer

7/9/16 7:21:09.000 PM kernel[0]: hfs: mounted Dropbox Installer on device disk3s2

7/9/16 7:21:09.887 PM mds[64]: (Volume.Normal:2464) volume:0x7fd3738a5800 ********** Bootstrapped Creating a default store:1 SpotLoc:(null) SpotVerLoc:(null) occlude:0 /Volumes/Dropbox Installer

7/9/16 7:21:09.907 PM mdworker[1413]: (ImportBailout.Error:1331) Asked to exit for Diskarb

7/9/16 7:21:09.907 PM mdworker[1414]: (ImportBailout.Error:1331) Asked to exit for Diskarb

7/9/16 7:21:09.908 PM mdworker[1416]: (ImportBailout.Error:1331) Asked to exit for Diskarb

7/9/16 7:21:09.910 PM mdworker[1415]: (ImportBailout.Error:1331) Asked to exit for Diskarb

7/9/16 7:21:09.915 PM mdworker[1428]: (ImportBailout.Error:1331) Asked to exit for Diskarb

7/9/16 7:21:09.918 PM mdworker32[1439]: (ImportBailout.Error:1331) Asked to exit for Diskarb

7/9/16 7:21:09.919 PM mdworker[1438]: (ImportBailout.Error:1331) Asked to exit for Diskarb

7/9/16 7:21:09.920 PM mdworker[1442]: (ImportBailout.Error:1331) Asked to exit for Diskarb

7/9/16 7:21:09.921 PM mdworker[1446]: (ImportBailout.Error:1331) Asked to exit for Diskarb

7/9/16 7:21:09.921 PM mdworker[1453]: (ImportBailout.Error:1331) Asked to exit for Diskarb

7/9/16 7:21:09.921 PM mdworker[1452]: (ImportBailout.Error:1331) Asked to exit for Diskarb

7/9/16 7:21:09.923 PM mdworker[1451]: (ImportBailout.Error:1331) Asked to exit for Diskarb

7/9/16 7:21:09.923 PM mdworker[1454]: (ImportBailout.Error:1331) Asked to exit for Diskarb

7/9/16 7:21:09.923 PM mdworker[1448]: (ImportBailout.Error:1331) Asked to exit for Diskarb

7/9/16 7:21:09.924 PM mdworker32[1440]: (ImportBailout.Error:1331) Asked to exit for Diskarb

7/9/16 7:21:09.925 PM mdworker[1456]: (ImportBailout.Error:1331) Asked to exit for Diskarb

7/9/16 7:21:10.065 PM lsd[572]: LaunchServices: Could not store lsd-identifiers file at /private/var/db/lsd/com.apple.lsdschemes.plist

7/9/16 7:21:10.097 PM lsd[572]: LaunchServices: Could not store lsd-identifiers file at /private/var/db/lsd/com.apple.lsdschemes.plist

7/9/16 7:21:10.000 PM kernel[0]: hfs: unmount initiated on Dropbox Installer on device disk3s2

7/9/16 7:21:10.420 PM DiskImages UI Agent[1461]: *** -[NSMachPort handlePortMessage:]: dropping incoming DO message because the connection is invalid

Also, we just noticed this report:

SpotlightNetHelp(624) deny file-read-data /Applications/App Store.app

Process: SpotlightNetHelp [624]

Path: /System/Library/PrivateFrameworks/ParsecUI.framework/Versions/A/Support/Spotlig htNetHelper.app/Contents/MacOS/SpotlightNetHelper

Load Address: 0x103655000

Identifier: com.apple.metadata.SpotlightNetHelper

Version: 972.34 (1.0)

Build Info: 6-SpotlightUI~972034000000000

Code Type: x86_64 (Native)

Parent Process: launchd [1]

User ID: 502

Date/Time: 2016-07-09 19:12:24.604 -0400

OS Version: Mac OS X 10.11.5 (15F34)

Report Version: 8

Thread 0:

0 libsystem_kernel.dylib 0x00007fff88245f72 mach_msg_trap + 10

1 CoreFoundation 0x00007fff87de81c4 __CFRunLoopServiceMachPort + 212

2 CoreFoundation 0x00007fff87de768c __CFRunLoopRun + 1356

3 CoreFoundation 0x00007fff87de6ed8 CFRunLoopRunSpecific + 296

4 Foundation 0x00007fff8ed36ed9 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 270

5 Foundation 0x00007fff8ed36db8 -[NSRunLoop(NSRunLoop) run] + 74

6 SpotlightNetHelper 0x000000010365e08b

7 libdyld.dylib 0x00007fff970c25ad start + 1

Thread 1:

0 libsystem_kernel.dylib 0x00007fff8824cefa kevent_qos + 10

1 libdispatch.dylib 0x00007fff87492dcd _dispatch_autorelease_pool_pop + 0

Thread 2:

0 libsystem_kernel.dylib 0x00007fff88245f72 mach_msg_trap + 10

1 CoreFoundation 0x00007fff87de81c4 __CFRunLoopServiceMachPort + 212

2 CoreFoundation 0x00007fff87de768c __CFRunLoopRun + 1356

3 CoreFoundation 0x00007fff87de6ed8 CFRunLoopRunSpecific + 296

4 CFNetwork 0x00007fff8863f095 +[NSURLConnection(Loader) _resourceLoadLoop:] + 412

5 Foundation 0x00007fff8ed47e64 __NSThread__start__ + 1351

6 libsystem_pthread.dylib 0x00007fff9d34199d _pthread_body + 131

7 libsystem_pthread.dylib 0x00007fff9d34191a _pthread_body + 0

8 libsystem_pthread.dylib 0x00007fff9d33f351 thread_start + 13

Thread 3:

0 libsystem_kernel.dylib 0x00007fff8824c07a __select + 10

1 libsystem_pthread.dylib 0x00007fff9d34199d _pthread_body + 131

2 libsystem_pthread.dylib 0x00007fff9d34191a _pthread_body + 0

3 libsystem_pthread.dylib 0x00007fff9d33f351 thread_start + 13

Thread 4:

0 libsystem_kernel.dylib 0x00007fff8824bc4a __open_nocancel + 10

1 CoreFoundation 0x00007fff87d7e0a7 _CFIterateDirectory + 87

2 CoreFoundation 0x00007fff87d7d838 _CFBundleGetBundleVersionForURL + 472

3 CoreFoundation 0x00007fff87d7c66e _CFBundleCreate + 222

4 LaunchServices 0x00007fff99c7c4b5 _LSCreateRegistrationData + 113

5 LaunchServices 0x00007fff99c79cd0 _LSDispatchRegistration(LSContext*, char const*, LSRegistrationInfo*, __CFData const*, __CFData const*, __CFData const*, __CFURL const*, __CFDictionary const*, unsigned int*, __CFArray**, unsigned char*) + 166

6 LaunchServices 0x00007fff99c0a18d _LSRegisterDirectoryNode(LSContext*, FSNode*, FSNode*, LSRegistrationInfo*, __CFData const*, __CFDictionary const*, __CFArray**, unsigned char*, unsigned int*) + 86

7 LaunchServices 0x00007fff99c09edc _LSRegisterBundleNode(LSContext*, unsigned int, FSNode*, FSNode*, unsigned int, __CFDictionary const*, __CFArray**, unsigned char*, unsigned int*) + 863

8 LaunchServices 0x00007fff99bd84a9 _LSFindOrRegisterBundleNode + 912

9 LaunchServices 0x00007fff99c62932 _LSDatabaseClean(LSDatabase*) + 456

10 LaunchServices 0x00007fff99bd60db _LSContextInit + 795

11 LaunchServices 0x00007fff99bef867 LSFindApplicationForInfo + 89

12 AppKit 0x00007fff9076b05d -[NSWorkspace URLForApplicationWithBundleIdentifier:] + 177

13 AppKit 0x00007fff9076af93 -[NSWorkspace absolutePathForAppBundleWithIdentifier:] + 84

14 StoreFoundation 0x00007fff994da36f CKiTunesAppVersion + 69

15 CommerceKit 0x00007fff94d39bd6 +[CKStoreClient configureClientAsType:] + 2472

16 Parsec 0x00007fff9ae93648 __27-[PRSBagHandler setActive:]_block_invoke522 + 39

17 libdispatch.dylib 0x00007fff8748d40b _dispatch_client_callout + 8

18 libdispatch.dylib 0x00007fff8748d303 dispatch_once_f + 67

19 Parsec 0x00007fff9ae933bd -[PRSBagHandler setActive:] + 1006

20 Parsec 0x00007fff9aebe057 -[PRSSearchSession activate] + 235

21 SpotlightNetHelper 0x000000010365d333

22 CoreFoundation 0x00007fff87de4a6c __invoking___ + 140

23 CoreFoundation 0x00007fff87de48fe -[NSInvocation invoke] + 286

24 Foundation 0x00007fff8ed50eb8 __NSXPCCONNECTION_IS_CALLING_OUT_TO_EXPORTED_OBJECT__ + 17

25 Foundation 0x00007fff8ed50822 -[NSXPCConnection _decodeAndInvokeMessageWithData:] + 1123

26 Foundation 0x00007fff8ed502f0 message_handler + 705

27 libxpc.dylib 0x00007fff9d9d856e _xpc_connection_call_event_handler + 35

28 libxpc.dylib 0x00007fff9d9d6de7 _xpc_connection_mach_event + 2198

29 libdispatch.dylib 0x00007fff87495596 _dispatch_client_callout4 + 9

30 libdispatch.dylib 0x00007fff87495a08 _dispatch_mach_msg_invoke + 555

31 libdispatch.dylib 0x00007fff87492200 _dispatch_queue_drain + 1207

32 libdispatch.dylib 0x00007fff8749435f _dispatch_mach_invoke + 735

33 libdispatch.dylib 0x00007fff87492200 _dispatch_queue_drain + 1207

34 libdispatch.dylib 0x00007fff87498707 _dispatch_queue_invoke + 549

35 libdispatch.dylib 0x00007fff87490d53 _dispatch_root_queue_drain + 538

36 libdispatch.dylib 0x00007fff87490b00 _dispatch_worker_thread3 + 91

37 libsystem_pthread.dylib 0x00007fff9d3414de _pthread_wqthread + 1129

38 libsystem_pthread.dylib 0x00007fff9d33f341 start_wqthread + 13

Thread 5:

0 libsystem_kernel.dylib 0x00007fff8824c5e2 __workq_kernreturn + 10

1 libsystem_pthread.dylib 0x00007fff9d33f341 start_wqthread + 13

Thread 6:

0 libsystem_kernel.dylib 0x00007fff8824c5e2 __workq_kernreturn + 10

1 libsystem_pthread.dylib 0x00007fff9d33f341 start_wqthread + 13

Thread 7:

0 libsystem_kernel.dylib 0x00007fff88245f72 mach_msg_trap + 10

1 CoreFoundation 0x00007fff87de81c4 __CFRunLoopServiceMachPort + 212

2 CoreFoundation 0x00007fff87de768c __CFRunLoopRun + 1356

3 CoreFoundation 0x00007fff87de6ed8 CFRunLoopRunSpecific + 296

4 Foundation 0x00007fff8ed36ed9 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 270

5 Parsec 0x00007fff9ae93aef -[PRSBagHandler startlocation] + 258

6 Foundation 0x00007fff8ed47e64 __NSThread__start__ + 1351

7 libsystem_pthread.dylib 0x00007fff9d34199d _pthread_body + 131

8 libsystem_pthread.dylib 0x00007fff9d34191a _pthread_body + 0

9 libsystem_pthread.dylib 0x00007fff9d33f351 thread_start + 13

Thread 8:

0 libsystem_kernel.dylib 0x00007fff8824c5e2 __workq_kernreturn + 10

1 libsystem_pthread.dylib 0x00007fff9d33f341 start_wqthread + 13

Thread 9:

0 libsystem_kernel.dylib 0x00007fff8824c5e2 __workq_kernreturn + 10

1 libsystem_pthread.dylib 0x00007fff9d33f341 start_wqthread + 13

Thread 10:

Binary Images:

0x103655000 - 0x103662fff com.apple.metadata.SpotlightNetHelper (1.0 - 972.34) <cc6944a9-ccab-3d9e-b1c0-f132dbc224bc> /System/Library/PrivateFrameworks/ParsecUI.framework/Versions/A/Support/Spotlig htNetHelper.app/Contents/MacOS/SpotlightNetHelper

0x7fff8748b000 - 0x7fff874b8fff libdispatch.dylib (501.40.12) <c7499857-61a5-3d7d-a5ea-65dcc8c3df92> /usr/lib/system/libdispatch.dylib

0x7fff87d5e000 - 0x7fff881d4fff com.apple.CoreFoundation (6.9 - 1258.1) <943a1383-da6a-3dc0-abcd-d9aeb3d0d34d> /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation

0x7fff88235000 - 0x7fff88253ff7 libsystem_kernel.dylib (3248.50.21) <78e54d59-d2b0-3f54-9a4a-0a68d671f253> /usr/lib/system/libsystem_kernel.dylib

0x7fff88637000 - 0x7fff888beff3 com.apple.CFNetwork (760.5.1 - 760.5.1) <ee9426d1-f11c-3dd4-ae08-ea29aeb27177> /System/Library/Frameworks/CFNetwork.framework/Versions/A/CFNetwork

0x7fff8ed12000 - 0x7fff8f066fff com.apple.Foundation (6.9 - 1259) <71a9d3a0-0b1f-3e3a-86f3-1486365a6ef2> /System/Library/Frameworks/Foundation.framework/Versions/C/Foundation

0x7fff90517000 - 0x7fff91140ff7 com.apple.AppKit (6.9 - 1404.47) <f3411f6e-dd87-34d0-8c68-c69b2205e41d> /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit

0x7fff94d19000 - 0x7fff94d4bfff com.apple.CommerceKit (1.2.0 - 463.9) <a74b7abc-5b01-3c09-af3c-6951b11d230a> /System/Library/PrivateFrameworks/CommerceKit.framework/Versions/A/CommerceKit

0x7fff970bf000 - 0x7fff970c2ffb libdyld.dylib (360.22) <cc088c2a-d407-33e7-a6b6-b06e0d4ad999> /usr/lib/system/libdyld.dylib

0x7fff994b0000 - 0x7fff99517ff7 com.apple.StoreFoundation (1.0 - 463.9) <e4a83f77-88d1-307a-b137-23cfcf0ab249> /System/Library/PrivateFrameworks/StoreFoundation.framework/Versions/A/StoreFou ndation

0x7fff99bcc000 - 0x7fff99cf1fff com.apple.LaunchServices (728.12 - 728.12) <f5ab56cd-cf33-33f0-a48d-372551714e77> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchS ervices.framework/Versions/A/LaunchServices

0x7fff9ae8b000 - 0x7fff9b045ffb com.apple.Parsec (1.0 - 972.34) <ab67f52d-8018-3bb2-b8b9-e10712f201d5> /System/Library/PrivateFrameworks/Parsec.framework/Versions/A/Parsec

0x7fff9d33e000 - 0x7fff9d347ff7 libsystem_pthread.dylib (138.10.4) <3dd1ef4c-1d1b-3abf-8cc6-b3b1ceee9559> /usr/lib/system/libsystem_pthread.dylib

0x7fff9d9cd000 - 0x7fff9d9f6ff7 libxpc.dylib (765.50.8) <54d1328e-054e-3daa-89e2-375722f9d18f> /usr/lib/system/libxpc.dylib