在 macOS Ventura 13.1 上，我透過 ddrescue 成功挽救了損壞的、無法安裝的磁碟 (Mac OS Extended (Journaled))：
ddrescue -v -f -n /dev/disk3s2 /Volumes/emptyhd/hd.dmg ~/logfile.log
幾天后，我在終端機中收到“完成”提示：
Current status
ipos: 654704 kB, non-trimmed: 0 B, current rate: 0 B/s
opos: 654704 kB, non-scraped: 35840 B, average rate: 14775 kB/s
non-tried: 0 B, bad-sector: 1024 B, error rate: 512 B/s
rescued: 11999 GB, bad areas: 2, run time: 8d 1h 55m
pct rescued: 0.00%, read errors: 2, remaining time: n/a
time since last successful read: 0s
Finished
雙擊 DMG 不起作用（彈出視窗顯示“無法識別”）。我還嘗試用以下方法安裝映像：
hdiutil attach -imagekey diskimage-class=CRawDiskImage /Volumes/emptyhd/hd.dmg
--> 不起作用。
然後我使用命令附加圖像文件：
hdiutil attach -nomount /Volumes/emptyhd/hd.dmg
然後
diskutil list
輸出
/dev/disk3 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: +12.0 TB disk3
帶有輸出的圖像資訊hdiutil imageinfo /Volumes/emptyhd/hd.dmg：
Class Name: CRawDiskImage
Size Information:
Total Bytes: 11999760071680
Compressed Ratio: 1
Sector Count: 23437031390
Total Non-Empty Bytes: 11999760071680
Compressed Bytes: 11999760071680
Total Empty Bytes: 0
Checksum Type: none
Format: UDRW
partitions:
partition-scheme: none
block-size: 512
appendable: false
partitions:
0:
partition-name: whole disk
partition-start: 0
partition-synthesized: true
partition-length: 23437031390
partition-hint: unknown partition
burnable: false
Format Description: raw read/write
Checksum Value:
Properties:
Encrypted: false
Kernel Compatible: true
Checksummed: false
Software License Agreement: false
Partitioned: false
Compressed: no
Segments:
0: /Volumes/DATA16TB/movies.dmg
Backing Store Information:
URL: file:///Volumes/DATA16TB/movies.dmg
Name: movies.dmg
Class Name: CBSDBackingStore
Resize limits (per hdiutil resize -limits):
min cur max
23437031390 23437031390 23437031390
那麼我如何從這裡繼續存取 dd IMG 中的資料？