建立包含 APFS 檔案系統的原始映像非常簡單：
$ hdiutil create -megabytes 1 -layout NONE -fs apfs -volname unicode unicode.dmg
created: /Users/daniel/test/apfs/unicode.dmg
現在我想將文件放入其中以進行我嘗試執行的特定測試，但我似乎無法附加它：
$ hdiutil attach unicode.dmg
hdiutil: attach failed - no mountable file systems
診斷：
$ hdiutil imageinfo unicode.dmg
nx_kernel_mount:1366: checkpoint search: largest xid 2, best xid 2 @ 3
nx_kernel_mount:1366: checkpoint search: largest xid 2, best xid 2 @ 3
nx_kernel_mount:1366: checkpoint search: largest xid 2, best xid 2 @ 3
nx_kernel_mount:1366: checkpoint search: largest xid 2, best xid 2 @ 3
nx_kernel_mount:1366: checkpoint search: largest xid 2, best xid 2 @ 3
nx_kernel_mount:1366: checkpoint search: largest xid 2, best xid 2 @ 3
Backing Store Information:
URL: file:///Users/tester/test/apfs/unicode.dmg
Name: unicode.dmg
Class Name: CBSDBackingStore
Class Name: CRawDiskImage
Checksum Type: none
Size Information:
Total Bytes: 1048576
Compressed Ratio: 1
Sector Count: 2048
Total Non-Empty Bytes: 1048576
Compressed Bytes: 1048576
Total Empty Bytes: 0
Format: UDRW
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: /Users/tester/test/apfs/unicode.dmg
partitions:
partition-scheme: none
block-size: 512
appendable: false
partitions:
0:
partition-name: whole disk
partition-start: 0
partition-synthesized: true
partition-length: 2048
partition-hint: unknown partition
partition-filesystems:
APFS: Untitled
burnable: false
Resize limits (per hdiutil resize -limits):
min cur max
2048 2048 2048
這裡的輸出看起來很不穩定，因為區塊大小和磁碟區標籤是錯誤的。所以我不確定發生了什麼事。 APFS 是只在某些特定條件下安裝的東西之一嗎？如果可以的話，什麼條件？或者有沒有辦法解決它來安裝我已經擁有的這個映像？