Jan 13, 2023 · Summary: This article helps you tackle the Mac error, "Unable to write to the last block of the device," which you may encounter when erasing or partitioning your internal hard …

Sep 12, 2025 · Need to fix Unable To Write to the Last Block of the Device error on Mac? We have several solutions available. Looking to fix Unable To Write to the Last Block of the Device …

Feb 6, 2020 · Error: -69760: Unable to write to the last block of the device". This error message when trying to erase an external hard drive, that disappeared after Catalina was installed.

Aug 12, 2024 · These 6 steps should help you fix the “Cannot write to last block of device” error on a Mac and get your storage device working again. If you are still having problems, it’s best …

Aug 7, 2014 · I think i did everything right but now i cannot initialize the SSD not formatted and I receive a "Unable to write to the last block of the device" error when i try to create a new partition.

Apr 21, 2023 · This article describes six efficient ways of fixing the “Unable To Write To The Last Block Of The Device -69760” error on a Mac.

Nov 21, 2018 · Disk Utility has been useless so far giving vague, cryptic errors as to why it can't erase it (can't unmount, In/out error, etc) I opened terminal in hopes of finding a work around …

If an attempt to Erase or Partition an SSD in macOS® returns the error of "Unable to write to the last block of the device," a few different issues could be causing the error. Try the steps below …

Aug 12, 2022 · From the View pop up menu, choose “Show All Devices” The disk list should show the device with the volume below it. Select the device and try to erase that.

Feb 19, 2021 · Apple: Unusable 2.5" external HDD. Partition failed with the error -69760: Unable to write to the last block of the device. Exfat only? Repairable? ...more