Adobe does not allow a "download all" of its 20,000+ fonts because of licensing. However, you can download all fonts within a specific collection :
Once you have all fonts selected, you can perform various actions like printing a font list, disabling families, or organizing them into collections. However, Font Book doesn't offer a dedicated "Download All" button for external fonts, as it primarily manages fonts already installed or available through Apple's cloud font service. download all and none font