Mac storage basics · Finding big files, Downloads and the Trash
What are .download and .crdownload files, and can I delete them?
Short answer: They're unfinished Safari (.download) and Chrome (.crdownload) downloads. If nothing is downloading, delete them; Safari can sometimes resume one by double-clicking.
They're unfinished downloads: Safari uses a .download package and Chrome a .crdownload file while a download is in progress. If a download failed or was cancelled, the partial file can stay behind and take space.
If nothing is downloading, delete them. Safari can sometimes resume a .download file if you double-click it.