On a Mac, the location depends on whether the file is a standard system update (like a point release) or a full major upgrade (like moving from Ventura to Sonoma).
When you download an update directly on your iPhone or iPad via , the files are stored in the device's internal system partition, which is not accessible to users. These files are automatically deleted after the update is successful. macOS Big Sur updates - location of files? - Ask Different where does apple download software update files
For recent versions like macOS Big Sur and later, partial download data may be stored in hidden system directories such as: On a Mac, the location depends on whether
Apple software update files are downloaded to different locations depending on your operating system (macOS or iOS/iPadOS) and whether you are updating the device itself or using a computer to perform the update. macOS Big Sur updates - location of files
These are typically stored in /Library/Updates . While the files reside here during the download and preparation phase, macOS often deletes them automatically once the installation is complete to free up space.