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Actually just found a solution for my issue with not being able to open ANY dmg on Catalina:sudo spctl --master-disable
THAT FIXED IT!!!!THANK YOU THANK YOU THANK YOU!For this entire time I've had to do 100% of my development without the simulator. This finally allows me to debug! So very thankful for the help. 🙂-Verxion
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Could you post screenshots? My situation is that on Catalina, whether I double click, control+click and choose "open", or right click and choose "open", I get the same dialog box, which just says "the following disk images couldn't be opened".To give you an idea, I get this even for example even when trying to access files from Apple: Download for Sketch-Verxion
Also tried resetting all content and settings in the simulator. Didn't help.
It took me five days to decrypt the drive, but once decrypted, the performance improved by ONE HUNDRED TIMES. Something is horribly wrong with Catalina’s accessing encrypted volumes... -Verxion
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Glad you got it working!Can you do me a favor and test the performance of accessing the SD card over USB-C? On my Retina MB, performance is basically USB1 levels. 😟-Verxion
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FYI, I think Catalina has some kind of horrendous logging or just bad support in general for external (USB-C) media. I get anywhere from just 4MB/s to "as much as" 20MB/s on either of my Samsung EVO 840 SSDs. It could honestly be choking just simply because of the performance.(I get abysmal performance on anything over USB-C, flash drives, 7200 rpm spinning hdds, SSDs (I have four kinds here), even SDHC cards are insanely slow)-Verxion
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I can see mine - I have a Samsung EVO 840 (two actually), but the performance in Catalina (both betas) is HORRIBLE. It ranges from literally 4MB/s to "as much as" 20MB/s. Absolutely horrendous.Not sure why you'd not be seeing it. I'd say try finding it in Disk Utility. Also, you can try this from terminal: diskutil cs listGood luck!-Verxion
