Skip to Content

Revised macOS Big Sur 11.2.1 Update Properly Checks Free Available Space to Prevent Installation Errors

by

When upgrading to macOS Big Sur, there was an error that would cause issues if there wasn't enough storage space available. Unfortunately, the update was not checking if there was enough free space before the installation started, which could lead to data loss.

First Look Big Sur Feature2
The free space issue has been addressed in a revised macOS Big Sur 11.2.1 update that was released this morning. According to Mr. Macintosh, the new update checks to make sure there is enough available storage space before installation starts.


If you don't have enough free space, the installer will say "There is not enough free space on the selected volume to upgrade the OS," and it will let you know how much additional space is required.

The new update that was released today is available only if you had not previously installed macOS Big Sur 11.2.1.

Related Forum: macOS Big Sur

Popular Stories

MacBook Neo Feature Pastel 1

First MacBook Neo Benchmarks Are In: Here's How It Compares to the M1 MacBook Air

Thursday March 5, 2026 4:07 pm PST by
Benchmarks for the new MacBook Neo surfaced today, and unsurprisingly, CPU performance is almost identical to the iPhone 16 Pro. The MacBook Neo uses the same 6-core A18 Pro chip that was first introduced in the iPhone 16 Pro, but it has one fewer GPU core. The MacBook Neo earned a single-core score of 3461 and a multi-core score of 8668, along with a Metal score of 31286. Here's how the...
Read Full Article • 361 comments
imac video apple feature

Apple Unveils Seven New Products

Friday March 6, 2026 11:48 am PST by
Apple this week unveiled seven products, including an iPhone 17e, an iPad Air with the M4 chip, updated MacBook Air and MacBook Pro models, a new Studio Display, a higher-end Studio Display XDR, and an all-new MacBook Neo that starts at just $599. iPhone 17e features the same overall design as the iPhone 16e, but it gains Apple's A19 chip, MagSafe for magnetic wireless charging and magnetic...
Read Full Article
Apple MacBook Pro M4 hero

Apple Planning 'MacBook Ultra' With Touchscreen and Higher Price

Sunday March 8, 2026 8:05 am PDT by
Apple is planning to launch an all-new "MacBook Ultra" model this year, featuring an OLED display, touchscreen, and a higher price point, Bloomberg's Mark Gurman reports. Gurman revealed the information in his latest "Power On" newsletter. While Apple has been widely expected to launch new M6-series MacBook Pro models with OLED displays, touchscreen functionality, and a new, thinner design...
Read Full Article • 465 comments

Top Rated Comments

HiRez Avatar
HiRez
66 months ago
Wow, this is a pretty basic thing to miss, with potentially terrible consequences. I mean checking free space before you install, wouldn't that be on the standard checklist since forever?
Score: 36 Votes (Like | Disagree)
N
NewUsername
66 months ago
Especially given how many Mac users still have a 128GB SSD.
Score: 25 Votes (Like | Disagree)
ouimetnick Avatar
ouimetnick
66 months ago
Why does an OS take up 35GB of space? I remember back when Snow Leopard cam out Apple bragged that it took less space than it's predecessor. Try trimming some of the bloat out of the next macOS release.
Score: 23 Votes (Like | Disagree)
jz0309 Avatar
jz0309
66 months ago
Apple SW QA still needs way more attention, way too many updates across ...
Score: 21 Votes (Like | Disagree)
Matthew.H Avatar
Matthew.H
66 months ago

Choosing storage space during purchasing is the responsibility of the buyer, not the seller. When people cheap out on storage space they are entering at their own risk.
It doesn't help that Apple has frankly been stingy on storage for years. They've only just recently made 256GB the minimum when it should have been the standard base at least 5 years ago.
Score: 20 Votes (Like | Disagree)
N
now i see it
66 months ago
Newbie mistake. What's going on over there?
Score: 17 Votes (Like | Disagree)
Read All Comments