Category Archives: Solutions

Tips, fixes, walkarounds.

Windows Server 2019: RD Session Host — ChangeMode “Invalid operation” exception

If you’re changing the client access licensing mode of your RD Session Host using the PowerShell $obj.ChangeMode(…) command and it fails with an error saying “Exception … Invalid operation”…

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“Install %OS%.app does not appear to be a valid OS installer application” (createinstallmedia error)

If you’re trying to create a bootable installer for an older macOS version (like El Capitan) with createinstallmedia, and it fails with a “does not appear to be a valid OS installer” error, quite possible the actual problem is that … Continue reading

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“MagickWand shared library not found” on uwsgi

If you’re getting this error while deploying a Python app on uwsgi: MagickWand shared library not found. You probably had not installed ImageMagick library. Try to install: apt-get install libmagickwand-dev It may not be what it seems: Wand’s load_library() function … Continue reading

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Kerio Connect server connection errors after upgrading to version 9.2.6

Kerio Connect 9.2.6 introduced a limit for a number of simultaneous connections from a single IP address, which is — by default — set to 100 per protocol. If more than a hundred of users start using Kerio Connect from … Continue reading

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Where does the AppStore version of DaVinci Resolve Studio 12 store its projects?

Make sure to make regular backups of this folder:

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Windows not detecting unallocated space after extending virtual disk

You’ve extended a virtual disk in Vmware or Proxmox for a Windows virtual machine, but the disk appears the same size in Disk Management?

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XQuartz.pkg stalls at “verifying” in El Capitan

I don’t know why OS X El Capitan sometimes fails to verify XQuartz 2.7.9 package (the process just gets stuck despite “Allow apps downloaded from anywhere” on “Enabled”). What I know, however, is that you can still install it via Terminal as easy … Continue reading

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Resuming link between Apogee Duet and keyboard volume controls

Oftentimes when I wake up my MBP from sleep mode or reconnect the Thunderbolt hub, Apogee Duet stops responding to keyboard sound volume controls. When it happens, I can still change Duet’s volume from Maestro or Audio MIDI Setup.app, just not using the keyboard … Continue reading

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Fix Color Picker in TextMate 2 under OS X Mavericks

To fix the Color Picker of TextMate 2 under OS X Mavericks (10.9), do the following: open ~/Library/Application Support/TextMate/Managed/Bundles/Bundle Support.tmbundle/Support/shared/lib/ui.rb, near lines 74-75 replace “AppleScript Runner” with “System Events”. That’s it.

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Xcode 4.6 stalls at “Creating universal binary” in OS X 10.9

If you’ve just upgraded to OS X 10.9 “Mavericks”, but chose to stay with good ol’ Xcode 4.6.3, it may stall at “Creating universal binary” when building projects.

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