iShowU now also requests that both the system and display don't sleep (while waiting to record, or while recording) You can now click on the camera 'positions' (only shown in the advanced tab) to change the camera PIP start position. Added a camera start position to every preset. It is highlighted in blue in the Video tab (Advanced). The camera will now start in the position. Use the shortcuts to change the current camera position. You can now enable periodic saving of movies (default, every 60s). Added option (in general preferences) to beep during countdown. Partial fix for AirPods (they work as a mic, but not as a mic & and playback). This possibly fixes issues with a number of other bluetooth based headsets as well. macOS 10.12 or earlier) will still boot until UEFI Secure Boot is enabled.When you need to go back to square one and return to a ‘clean’ installation of macOS, simply re-installing macOS is insufficient: what you need is a clean re-install. It’s clean because it isn’t simply installed on top of your existing files, and it’s a re-install because those system files are there already. In Mojave and earlier, a clean re-install is straightforward if time-consuming. You boot into Recovery Mode, use Disk Utility there to wipe your boot volume, then re-install macOS from the main window. What determines the source and version of macOS to be re-installed are the keys you hold down to enter the mode in the first place. Try this in Catalina and the first thing you’ll realise is that you don’t just have a single boot volume now, you’ve got two, one called something like Macintosh HD, the other Macintosh HD - Data. The first of those is the read-only System volume, and the second the read-write Data volume.
Because you want to re-install macOS, the logical thing to do would be to wipe the System volume, which suggests that you could get away with retaining your own files on the Data volume through a clean re-install. To perform a clean re-install in Catalina, once in Recovery Mode, you need to delete your Data volume, that’s the one named Macintosh HD - Data, or something similar if you’re using a custom name, and to erase your System volume. In Recovery Mode select the Macintosh HD - Data volume at the left of Disk Utility’s window then use the Delete APFS Volume command from the Edit menu, or use the shortcut by clicking the – tool.
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