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You're probably fine, but it depends and since it's taking up no space, no good reason to delete it yet. It's simply a database file put there by something (again, probably not OS X.) You should attem …

My recommendation would be one of the following: Update macOS and... Switch to Photos (IMO it's actually much better than iPhoto.) Continue to use iPhoto. … Though it won't launch normally, if you right click it, hit "Show Package Contents" and navigate to Contents/MacOS/iPhoto and double click, it should launch. …

Try running qlmanage -r. This should reload QuickLook and make it so it's no longer focused on those files. You can also try using something like Trash It! if after restarting and relaunching/killing …

System Integrity Protection (SIP.) It locks up a variety of files to prevent malicious software from modifying it including /System. You can temporarily disable SIP, modify your files, then turn it ba …

You can't unmount the disk because you're booting from it. You'll need to boot from an external volume or the internet: I would recommend the latter since it's probably the fastest and most hassle fre …

It may be a GPU issue: check to see if your MacBook Pro that may have been manufactured with a defective GPU.

Depending on where you got it from, it's either malware or just useless. You should uninstall it either way. Although the official version of MacKeeper isn't directly harmful usually and doesn't qual …

Not sure, but it might be possible to install the .net framework on OS X. That's just from a quick Google search, and I don't truly understand this stuff, but take a look. I believe you can also use W …

Standby is effectively hibernate mode, one of the several versions of sleep. It's actually possible to set the sleep mode, then call pmset sleepnow. Let's go over each of the sleep modes: 0 - Old st …

If it's responding with No Java runtime present, requesting install.... well, it's not installed. I believe that Apple's default installer still installs Java 6; I'd recommend getting the latest versi …

You can spoof your MAC address, which is significantly less effort than setting up a VM. Your command should be along the lines sudo ifconfig en1 Wi-Fi xx:xx:xx:xx:xx:xx, where en1 is your network in …

Per Apple, assuming you're on OS X 10.7 or higher: Delete the orphaned home directory. Log out of the account you're renaming, then log in to a different administrator account. Go to the Users folde …

I would recommend just letting it finish then removing it. MacWorld has a pretty good guide, but I'll skip some of it in favor of just downloading MalwareBytes Anti-Malware and letting it do it's job …

Works, but only under macOS because the adapter still doesn't work under Windows for reasons that I really don't understand and Apple couldn't seem to explain to me over the phone either, and even then … only after updating macOS to... some version of Mojave not sure which: Connecting a Thunderbolt Display to a Thunderbolt 3 enabled computer using Apple's Thunderbolt 3 to Thunderbolt 2 (not USB-C to Thunderbolt …

Not all applications are stored in /Applications. That's the default install folder for most applications, but it doesn't include all applications. In fact, since applications are really just bundles …