I tried today several time on BigSur (Intel) with Unity Hub Version 2.4.3.
I gave the Unity Hub full disk access from Secuity & Privacy.
I have 350GB of free space, it seems they aren’t enough or it’s (most probably) an installer bug.
The Log:
{“moduleName”:“DownloadRequest”,“level”:“warn”,“message”:“[ ‘Something went wrong while writing to the file of https://download.unity3d.com/download_unity/507919d4fff5/MacEditorInstaller/Unity-2020.3.8f1.pkg Error: ENOSPC: no space left on device, write Error: ENOSPC: no space left on device, write’ ]”,“timestamp”:“2021-05-21T15:19:03.833Z”}
{“moduleName”:“EditorDownloader”,“level”:“warn”,“message”:“[ ‘Editor Downloader 2020.3.8f1: Failed to download the Editor, stopping all pending module downloads’ ]”,“timestamp”:“2021-05-21T15:19:03.834Z”}
{“moduleName”:“EditorDownloader”,“level”:“warn”,“message”:“[ ‘Download error: Error: ENOSPC: no space left on device, write’ ]”,“timestamp”:“2021-05-21T15:19:03.834Z”}
{“moduleName”:“Download”,“level”:“warn”,“message”:“[ ‘Editor downloader 2020.3.8f1 critical error, failed to download the Editor, warning the whole App’ ]”,“timestamp”:“2021-05-21T15:19:03.834Z”}
{“moduleName”:“Download”,“level”:“warn”,“message”:“[ ‘Error: Error: ENOSPC: no space left on device, write’ ]”,“timestamp”:“2021-05-21T15:19:03.834Z”}
{“moduleName”:“DownloadsCluster”,“level”:“info”,“message”:“[ ‘Download Cluster cluster-2020.3.8f1: Canceled’ ]”,“timestamp”:“2021-05-21T15:19:03.835Z”}
{“moduleName”:“EditorDownloader”,“level”:“info”,“message”:“[ ‘Editor Download 2020.3.8f1: Canceled’ ]”,“timestamp”:“2021-05-21T15:19:03.835Z”}
{“moduleName”:“DownloadManager”,“level”:“warn”,“message”:“[ ‘Could not download from https://download.unity3d.com/download_unity/507919d4fff5/MacEditorInstaller/Unity-2020.3.8f1.pkg to /var/folders/pm/_q_lcqsj34s2mfzc0dhk291r0000gn/T/unityhub-b17eb400-ba46-11eb-a3f0-812fa31ba62e/Unity-2020.3.8f1.pkg Error: ENOSPC: no space left on device, write Error: ENOSPC: no space left on device, write’ ]”,“timestamp”:“2021-05-21T15:19:03.837Z”}
I’m trying to manually download the .pkg file reported in the log file.