I also reinstalled guest Ubuntu but the problem still persists. I reinstalled VirtualBox, but there's no change after that. In addition to that, there's no Application registered to Privacy settings on OSX that has requested Camera access. ** (cheese:1592): CRITICAL **: 15:09:30.053: cheese_preferences_dialog_setup_resolutions_for_device: assertion 'device != NULL' failedĪlso, the green light on the Macbook indicating that the camera is in use, does not blink at all during the whole process. (omitted: one common thing was assertion: device != NULL failed) I enabled Facetime HD Camera VirtualBox(Menu bar > Devices > Webcams > Facetime HD Camera checkbox on), but when I test the /dev/video0 and /dev/video1 with cheese command on guest blank screen shows up with this error: ** Message: 15:09:30.041: cheese-application.vala:211: Error during camera setup: No device found On this VBox configuration, I installed Ubuntu 18.04 as guest with default configuration(no modification to settings except for Enabling USB Controller) ![]() ![]() I installed Virtualbox & extension pack 6.0.6 on OSX host(on Mackbook pro with Type-c, 2018 15".
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