How to prevent macOS Catalina 10.15.4 from hanging when copying large files

Comments

• Reply 21 of 26

  MacPro Posts: 19,728member

  April 25, 2020 7:56PM

  Or use Carbon Copy Cloner.  I just copied 12 TB without issue.
• Reply 22 of 26

  danuff Posts: 33member

  April 26, 2020 1:58PM

  I haven’t experienced any problems like this (2012 MBP) but I’m not using RAID. Hope this gets fixed soon, though.
• Reply 23 of 26

  AniMill Posts: 156member

  April 27, 2020 4:24AM

  I’ve had to deal with this bug, but my solution was simple: I ended up using Chronosync to perform those file copies. It does a better job of preparing for the copy, examining the file, then has a process that tracks the copy much more accurately than finder. Finder’s copy/paste is really antiquated. Hell, WINDOWS 10 file explorer copy/paste is much more informative and stable.
• Reply 24 of 26

  dieter Posts: 3member

  April 28, 2020 11:40AM

  MacPro said:

  Or use Carbon Copy Cloner.  I just copied 12 TB without issue.

  CCC didn't solve the issue... not over USB, ethernet, Thunderbolt. Disabling SIP did the job, but I'm without WiFi because of this.
• Reply 25 of 26

  noraa1138 Posts: 31unconfirmed, member

  May 1, 2020 3:59AM

  I can confirm this is STILL an issue on 10.15.5 beta 3. So incredibly frustrating
• Reply 26 of 26

  noraa1138 Posts: 31unconfirmed, member

  May 1, 2020 4:09AM

  dieter said:

  MacPro said:

  Or use Carbon Copy Cloner.  I just copied 12 TB without issue.

  CCC didn't solve the issue... not over USB, ethernet, Thunderbolt. Disabling SIP did the job, but I'm without WiFi because of this.

  You can re-enable SIP after making the NVRAM changes, and WiFi will start working again. I just confirmed, an the NVRAM changes stick even after re-enabling SIP.