MacOS

Encrypted Disk Images

• Start Disk Utility
• Choose File -> New Image -> Blank Image
• Pick a maximum Size - take care with this, as your disk image won’t be able to grow larger than the value you set
• Format should be APFS (Case-sensitive) unless you’re running a spinning disk drive, in which case pick Mac OS Extended (Case-sensitive, Journaled)
• Encryption should be 256-bit AES unless that’s too slow for you
• Image Format should be either sparse bundle disk image or sparse disk image.
  • Use sparse disk image if you want to create a single, large, encrypted file
  • Use sparse bundle disk image if you want to create a lot of smaller, encrypted files - useful if you want to sync this image using something like OneDrive/Dropbox/whatever.

– via Apple Support and Eclectic Light Company

ImageMagick Commands

# Convert png to jpg, with 95% quality, while stripping any metadata
convert -strip -quality 95% <source>.png <destination>.jpg