You use a mac. Mac isn't friendly with sdcards. Boot hekate and use its "Archive bit fix" function or have a look here: https://gbatemp.net/threads/how-to-fix-archive-bit-for-all-sd-files-and-folders.515258/
check /atmosphere/content folder for old sysmodules and cheats.
I'd start with an empty /atmosphere/content to check if Atmosphere boots properly, then add latest versions of your sysmodules.