Here is what it looks like (two regular png images which previews were working fine before I upgraded to Mojave). Third one is a folder with custom picture and it was like that on High Sierra too. About the filenames, I like using spaces but using anything else don't change anything.    Here is what I've tried:   Right click on Desktop, then "View options" -> "Show icon preview" (disabling/enabling it doesn't change anything) Restart computer Restart Finder I don't see anything in system.log I couldn't find much in "Console" in general I also tried to mess with the IconServiceAgent (, )   Thanks for the duplicate suggestion, I found this is Console when starting iconserviceagent manually (either root or not):  iconservicesagent[20837]: assertion failed: 18A391: libxpc.dylib + 39253   Finder[870]: objc[870]: Class FIFinderSyncExtensionHost is implemented in both /System/Library/CoreServices/Finder.app/Contents/MacOS/Finder (0x10a018b80) and /System/Library/PrivateFrameworks/FileProvider.framework/OverrideBundles/FinderSyncCollaborationFileProviderOverride.bundle/Contents/MacOS/FinderSyncCollaborationFileProviderOverride (0x10e74ddc8). One of the two will be used. Which one is undefined.
I have a dozen or so image files on my iMac's desktop.  Most of the time, after booting up my computer, it displays a thumbnail of each image (as it should).  But sometimes, the thumbnails won't show up (see screenshot below).    It appears to happen randomly.  I estimate that it happens about 20% of the time.  Why is this, and how can I prevent it from happening?  I am running OS X 10.9.4.  Thanks.
How to get the EXIF data from a file using C# I would like to write a small program in C# which goes through my jpeg photos and, for example, sorts them into dated folders (using MY dating conventions, dammit...).   Does anyone know a relatively easy way to get at the EXIF data such as Date And Time or Exposure programatically? Thanks! How can Yoda identify Darth Bane? In the final episode of season 6 of The Clone Wars, (spoilers)      The mystical priestesses conjure up an illusion of Darth Bane, the ancient Sith Lord who started the Rule of Two. Just by visual inspection, Yoda knows the ancient Sith Lord's name and that he was the one who started the Rule of Two.   Darth Bane was around roughly a century before Yoda was born. It also seems like all of the Jedi who ever encountered him did not live long enough to talk about it (for example, the duel on Typhon). By the time Darth Zannah took the mantle as Dark Lord of the the Sith, the Jedi were convinced that the Sith were extinct.   explains how the Jedi found out about the Rule of Two, but it doesn't explain how Yoda was able to learn about the identities of the members of the Order of the Sith Lords. Why is (sizeof(int) > -1) false? Enumerate within TikZ node How vibration sensitive are hard disk drives? I've gotten my hands on a seriously cheap laptop grade 2.5 inch drive. I'm intending to use one on a desktop that doesn't have 2.5 inch bays as a boot drive. While I know there are adapters available, I know its fairly common with SSDs to simply velcro/tape the drive somewhere. I'm wondering if I can do the same with a laptop hard drive.  One issue I see here is SSDs are fairly insensitive to vibration, while hard drives are. Just how vibration sensitive are drives? Would a jerry rigged mount need to take this into account? How can I  compare (without calculator or similar device) the values of $\pi^e$ and $e^\pi$ ? In chat, the short code [metaso] expands to http://meta.stacexchange.com/ (no typo, the missing 'k' is the bug I'm reporting).  (And since this is too short a bug report, I'll note that I think that [metaso] should probably point to .) What is the use of the yield keyword in Python? What does it do? For example, I'm trying to understand this code1: def _get_child_candidates(self, distance, min_dist, max_dist):     if self._leftchild and distance - max_dist &lt; self._median:         yield self._leftchild     if self._rightchild and distance + max_dist &gt;= self._median:         yield self._rightchild    And this is the caller: result, candidates = [], [self] while candidates:     node = candidates.pop()     distance = node._get_dist(obj)     if distance &lt;= max_dist and distance &gt;= min_dist:         result.extend(node._values)     candidates.extend(node._get_child_candidates(distance, min_dist, max_dist)) return result  What happens when the method _get_child_candidates is called? Is a list returned? A single element? Is it called again? When will subsequent calls stop?   1. This piece of code was written by Jochen Schulz (jrschulz), who made a great Python library for metric spaces. This is the link to the complete source: [Module mspace][1]. Limit with inverse trignometry We have to find the value of $$\lim_{n\to \infty}\sum_{k=2}^n\arccos\left(\frac{1+\sqrt{(k-1)k(k+1)(k+2)}}{k(k+1)}\right)$$  I tried it a lot but could not find any start.   Please help me in this . Website giving pronunciations of English words recorded in different dialects? I'm aware that there are certain websites around that provide recorded examples of English words pronounced in different accents/dialects.  Could anybody list some of them? Is there a way to take a screenshot using Java and save it to some sort of image? Simple as the title states: Can you use only Java commands to take a screenshot and save it?  Or, do I need to use an OS specific program to take the screenshot and then grab it off the clipboard? Beamer: Vertical alignment of multi-column ToC Safely turning a JSON string into an object Calculating RSA private exponent when given public exponent and the modulus factors using extended euclid Can I turn off macOS Catalina's internal display without close the lid while using an external monitor? How do I disable fog on specific camera/s Whenever I am given a system type with a certain transfer function, I am always asked to proceed to find out the 1. impulse response and 2. step response of the system. My question is, what is so special about these two response types that other responses, like for example parabolic response, is not what I am asked to find out? How can I remove the new weather information from the taskbar? How to distinguish Nexus 7 (2012) and Nexus 7 (2013) I am having trouble with Bluetooth Low Energy (BT 4.0) on a Nexus 7.  I think I may have a 2012 model.  How to tell if I have a 2012 or 2013 version of the Nexus 7? So, when I point a laser at a piece of wire (pointed at a specific angle), a circle of light appears on a wall behind it (see image below). I am trying to see why this happens and if there are any readings on this. Could anyone give some tips on what I should search for or any references?   ()  So this is a problem for a physics tournament, but I haven't tried it myself yet. However I have found a video depicting what I mean.