Problem Description
I recently wanted to install a UE4 to experience it, but during the installation process, the system prompts me that the remaining space is insufficient, but my computer clearly shows that there is still 180G of space, and UE4 only needs about 25G. Then I checked Disk Utility, It is found that my space is basically used up, and there is only 22 G of remaining space, but (Purgeable) is written in parentheses, which means it can be purged, so what is this? How to delete it?
Clear space
A kind of space invented by Apple a long time ago. To put it bluntly, it is a bit like a bank. You store the money in it. The bank does not put the money in the safe and wait for you to pick it up next time. Thing, but if you want to use it anytime, you can take it away at any time.
This clearable space means this. It will use the space you don't normally use to store some things, such as computer backups. When you need this space, it will automatically free up this space for you.
but! ! ! The situation I encountered is that I want to use it now, but I don’t use it! I think it's catalina's pot for the time being, it may be better after a while.
Solution
I think most of these spaces are used to store less important things
method 1
Original link! ! ! Click here to read the original text
当iCloud / iCloud Drive 选项 / “优化 Mac 储存空间” 被启用的时候，
在“关于本机”的“储存”标签中就可能看到 “可清除”内容这一类（Purgeable, 斜线条区域），
很多人很困惑这个“ 可清除” 内容到底是什么吧？这表示有些内容可以删除，
以后想要用的时候可以再下载。那些内容呢？
a) Photos 里面的原图。打开 Photos 选项，里面有优化 Mac 空间的项目。
b) iTunes 里下载的电影，歌曲。打开 iTunes 选项，里面有删除看过的电影这个选项。
c) 邮件里的附件。打开邮件选项，里面有任何保存附件的选项。
取消 "优化 Mac 储存空间“ 就一键取消以上的选项。
此外还有 iCloud Drive 里最上面的选项 “将“桌面”和“文稿”的文件储存到 iCloud Drive” 没有启用的话，
你的桌面文档不会被移到 iCloud Drive 去。以及释放垃圾箱等等。都属于“可清除”内容。
你不清除也没关系，它就是一直在扫描然后建议你说这些那些可以移走可以释放多少空间。
用不用随你了。
Method 2
Reposted from knowing that the above solution is indeed useful, but there are not many things in the cache, and the effect of deleting it is limited.
I won’t describe it in detail. Let’s see for yourself and
know the solution of the Great God, click here!!!
Method 3
I also saw this method from a question and answer site on the Internet. The pro-test is more useful. For those friends who have opened timemachine, the mac will now automatically back up you when you are not connected to an external hard drive. Then backup Where does it exist? I’m sorry it’s stored in your computer, so you can choose the following two ways:
1. Take your backup hard drive, and the occupied hard disk will disappear after
backup 2. Delete the backup in these computers (if If you think it’s useless) The
operation is as follows, just copy it
. When deleting, just look at the time code.
If you have any questions, just leave a message below and I will try my best to answer
PEACE~~