When I started my Mac up, its external backup storage was present as expected, but couldn’t be opened. It turned out that Time Machine had stopped backing up after 12:35 the previous day, but hadn’t reported the problem.
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T2M2 is nearly 9 years old. Here’s a walk through its summary reports on Time Machine backups. and an outline of what you’ll see in its log extracts.
How to exclude folders and files from these services, with new problems apparent in macOS Tahoe over exclusions from Time Machine backups.
If you’ve got large files like Virtual Machines or media libraries on the Data volume on your Mac’s internal SSD, use this method to keep the size of its snapshots smaller.
Are you prepared for the removal of support for AFP in a ‘future version of macOS’? Here’s what you need to know, and what you should consider doing.
Backups don’t include everything. Here are details of those items excluded from Time Machine backups, and why they’re excluded.
The rules for preserving document versions are based on their being associated with the document’s inode number, and on the same volume. Here are the details and a way to preserve them whatever.
How do clone files and sparse files cope with being backed up and restored? Can they save space in iCloud Drive? Some of these answers may surprise.
How DAS gathers its budgets and loads lists of activities. When rescoring permits, it then dispatches the process to initiate backup. Re-scheduling has changed in Sequoia, as shown here.
Deciding which file system to use for hard disks can be difficult. Here are the advantages and disadvantages explained in detail, for HFS+ and APFS.
The Eclectic Light Company 